Inclusion Criteria:

• Participant has provided informed consent prior to initiation of any study specific activities/procedures.
• Age greater than or equal to 18 years old at the same time of signing the informed consent.
• Histologically or cytologically confirmed Extended Stage Small Cell Lung Cancer (ES-SCLC) and no prior systemic treatment for ES-SCLC.
• Participants with prior treatment for limited-stage SCLC (LS-SCLC) are permitted.
• Eastern Cooperative Oncology Group (ECOG) 0 to 1.
• Participants with treated asymptomatic brain metastases are eligible provided they meet defined criteria.
• Adequate organ function as defined in protocol.

Exclusion Criteria:

• History of other malignancy within the past 2 years with exceptions.
• Major surgery within 28 days of study day 1.
• Untreated or symptomatic brain metastases and leptomeningeal disease.
• Participants who experienced recurrent grade 2 pneumonitis or severe or life-threatening immune-mediated adverse events or infusion-related reactions including those that lead to permanent discontinuation while on treatment with immuno-oncology agents.
• History of immune-related colitis.
• History or evidence of interstitial lung disease or active, non-infectious pneumonitis.
• Has a diagnosis of immunodeficiency or is receiving systemic steroid therapy or any other form of immunosuppressive therapy within 7 days prior to the first dose of study treatment.
• History of solid organ transplantation.
• History of hypophysitis or pituitary dysfunction.
• History of solid organ transplantation or allogeneic hematopoietic stem cell transplantation.
• Active autoimmune disease that has required systemic treatment (except replacement therapy) within the past 2 years or any other diseases requiring immunosuppressive therapy while on study. Participants with Type I diabetes, vitiligo, psoriasis, hypo- or hyper-thyroid disease not requiring immunosuppressive treatment are permitted.

Inclusion Criteria:

• Participant must have histologically or cytologically confirmed, locally advanced or metastatic, non-small cell lung cancer (NSCLC) that is not amenable to curative therapy including surgical resection or chemoradiation. Additional Cohort specific disease requirements include: Cohorts 1, 3, 5 and 6: epidermal growth factor receptor (EGFR) exon 19 deletion (Exon19del) or Exon 21 L858R mutation; Cohort 2: EGFR Exon 20ins mutation EGFR Exon19del or Exon 21 L858R mutation (Cohort 1, 3, 5 and 6) or EGFR Exon 20 insertion mutation (Cohort 2) must have been identified as determined by Food and Drug Administration (FDA) approved or other validated test of either circulating tumor deoxyribonucleic acid (ctDNA) or tumor tissue in a clinical laboratory improvement amendments (CLIA) certified laboratory (sites in the United states [US]) or an accredited local laboratory (sites outside of the US). A copy of the initial test report documenting the EGFR mutation must be included in the participant records and a deidentified copy must also be submitted to the sponsor
• Have at least 1 measurable lesion, according to Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1. If the only target lesion has been previously irradiated, it must show signs of disease progression since radiation was completed
• May have a prior or concurrent second malignancy (other than the disease under study) which natural history or treatment is unlikely to interfere with any study endpoints of safety or the efficacy of the study treatment(s)
• Have adequate organ (renal, hepatic, hematological, coagulation and cardiac) functions
• Participant must have eastern cooperative oncology group (ECOG) status of 0 or 1
• Cohort 6: Must be eligible for, and agree to comply with, the use of prophylactic anticoagulation with a direct oral anticoagulant or a low molecular weight heparin during the first 4 months of study treatment
• A female participant must agree not to donate eggs (ova, oocytes) or freeze for future use for the purposes of assisted reproduction during the study and for a period of 6 months after receiving the last dose of study treatment. Female participants should consider preservation of eggs prior to study treatment as anti-cancer treatments may impair fertility

Exclusion Criteria:

• Participant has a medical history of interstitial lung disease (ILD), including drug induced ILD or radiation pneumonitis
• Participant has a history of hypersensitivity to any excipients of the investigational products to be used in their enrollment cohort
• Participant has received a live or live attenuated vaccine within 3 months before Cycle 1 Day 1. The seasonal influenza vaccine and non-live vaccines against Coronavirus disease 19 (COVID-19) are not exclusionary
• For all cohorts (regimens potentially including lazertinib) except cohort 2: Participant is currently receiving medications or herbal supplements known to be potent Cytochrome (CYP3A4/5) inducers and is unable to stop use for an appropriate washout period prior to Cycle 1 Day 1
• Other clinically active liver disease of infectious origin
• Participant has a history of clinically significant cardiovascular disease including, but not limited to: a) All cohorts (regimens potentially including lazertinib) except Cohort 2: diagnosis of deep vein thrombosis or pulmonary embolism within 1 month prior to the first dose of study treatment(s), or any of the following within 6 months prior to the first dose of study treatment(s): myocardial infarction, unstable angina, stroke, transient ischemic attack, coronary/peripheral artery bypass graft, or any acute coronary syndrome. Clinically non-significant thrombosis, such as non-obstructive catheter-associated clots, are not exclusionary; b) All cohorts (regimens potentially including lazertinib) except Cohort 2: Participant has a significant genetic predisposition to venous thromboembolic events (VTE; such as Factor V Leiden); c) All cohorts (regimens potentially including lazertinib) except Cohort 2: Participant has a prior history of VTE and is not on appropriate therapeutic anticoagulation as per NCCN or local guidelines; d) prolonged corrected QT interval by Fridericia (QTcF) interval greater than (>) 480 milliseconds (msec) or clinically significant cardiac arrhythmia or electrophysiologic disease (example, placement of implantable cardioverter defibrillator or atrial fibrillation with uncontrolled rate); e) uncontrolled (persistent) hypertension: systolic blood pressure >160 millimeter(s) of mercury (mmHg); diastolic blood pressure >100 mmHg; f) Congestive heart failure defined as NYHA class III-IV or hospitalization for congestive heart failure (CHF) (any New York Heart Association [NYHA] class) within 6 months of treatment initiation at Cycle 1/day 1 (C1D1); g) pericarditis/clinically significant pericardial effusion; h) myocarditis; i) baseline left ventricular ejection fraction (LVEF) below the institution's lower limit of normal at screening, as assessed by echocardiogram or multigated acquisition (MUGA) scan
• Participant has symptomatic brain metastases. A participant with asymptomatic or previously treated and stable brain metastases may participate in this study. Participants who have received definitive radiation or surgical treatment for symptomatic or unstable brain metastases and have been clinically stable and asymptomatic for at least 2 weeks before Screening are eligible, provided they have been either off corticosteroid treatment or are receiving low-dose corticosteroid treatment (less than or equal to [<=] 10 milligrams per day [mg/day] prednisone or equivalent) for at least 2 weeks prior to treatment allocation

Inclusion Criteria:

• Patients must be < 50 years at the time of enrollment.
• Patients must have =< 4 nodules per lung consistent with or suspicious for metastases, with at least one of which being >= 3 mm and all of which must be =< 3 cm size.
• Note: Patient must have eligibility confirmed by rapid central imaging review.
• Lung nodules must be considered resectable by either open thoracotomy or thoracoscopic surgery. Determination of resectability is made by the institutional surgeon.
• Patients must have a histological diagnosis of osteosarcoma.
• Patients must have evidence of metastatic lung disease at the time of initial diagnosis, or at time of 1st recurrence following completion of therapy for initially localized disease.
• Patients with newly diagnosed disease must have completed successful gross tumor resection for their primary tumor or surgical local control of primary tumor must be planned to be performed simultaneously with thoracic surgery.
• Newly diagnosed patients must be receiving systemic therapy considered by the treating physician as at least equivalent to methotrexate, doxorubicin and cisplatin (MAP) at the time of enrollment on this study.
• Patients at time of 1st recurrence must have previously completed initial systemic therapy for their primary tumor, considered by the treating physician as at least equivalent to MAP.

Exclusion Criteria:

• Patients with unresectable primary tumor.
• Patients with pulmonary metastatic lesions that would require anatomic resection (lobectomy or pneumonectomy) or lesions that are defined as "central" (i.e., central lesion involves or is proximal to segmental bronchi and peripheral is lesion distal to segmental bronchi).
• Patients with pleural or mediastinal based metastatic lesions, or with pleural effusion.
• Patients with disease progression at either the primary or pulmonary metastatic site while on initial therapy. Note: Once the patient has been enrolled on the study, additional computed tomography (CT) scans are not anticipated prior to thoracic surgery. Note: Some variation in nodule size measurements over the course of pre-operative therapy is anticipated and does not qualify for exclusion unless deemed true disease progression by the primary treatment team.
• Patients with evidence of extrapulmonary metastatic disease.
• Patients who received therapeutic pulmonary surgery for lung metastasis prior to enrollment.
• All patients and/or their parents or legal guardians must sign a written informed consent.
• All institutional, Food and Drug Administration (FDA), and National Cancer Institute (NCI) requirements for human studies must be met.

Inclusion Criteria:

• Has pathologically (histologically or cytologically) confirmed diagnosis of NSCLC
• Has Stage IIIA, IIIB, or IIIC NSCLC by American Joint Committee on Cancer Version 8
• Is unable to undergo surgery with curative intent for Stage III NSCLC
• Has no evidence of metastatic disease indicating Stage IV NSCLC
• Has measurable disease as defined by RECIST 1.1
• Has not received prior treatment (chemotherapy, targeted therapy or radiotherapy) for Stage III NSCLC; participants who have received neoadjuvant and/or adjuvant therapy for early stage disease are not eligible
• Has provided a tumor tissue sample (tissue biopsy [core, incisional, or excisional])
• Has an Eastern Cooperative Oncology Group (ECOG) Performance Status of 0 or 1 assessed within 7 days prior to the first administration of study intervention
• Has a life expectancy of at least 6 months
• A male participant must agree to use contraception and refrain from donating sperm during the intervention period and for at least the time needed to eliminate each study intervention after the last dose of study intervention unless confirmed to be azoospermic (vasectomized or secondary to medical cause). The length of time required to continue contraception for each study intervention is as follows: Olaparib, platinum doublet, and radiotherapy: 90 days
• A female participant is eligible to participate if she is not pregnant, not breastfeeding, and agrees to use contraception and refrain from donating eggs (ova, oocytes) to others or freeze/store for her own use for the purpose of reproduction during the treatment period and for at least the time needed to eliminate each study intervention after the last dose of study intervention and agrees to abstain from breastfeeding during the study intervention period and for at least 120 days after the last dose of study intervention. The length of time required to continue contraception for each study intervention is as follows: Pembrolizumab: 120 days; Olaparib, platinum doublet, and radiotherapy: 180 days
• Has a negative highly sensitive pregnancy test ([urine or serum] as required by local regulations) within 24 hours for urine or within 72 hours for serum before the first dose of study intervention. If a urine test cannot be confirmed as negative (e.g., an ambiguous result), a serum pregnancy test is required. In such cases, the participant must be excluded from participation if the serum pregnancy result is positive.
• Has had her medical history, menstrual history, and recent sexual activity reviewed by the investigator to decrease the risk for inclusion of a woman with an early undetected pregnancy.
• Has adequate pulmonary function tests
• Has adequate organ function
• Has provided written informed consent

Exclusion Criteria:

• Has small cell lung cancer or a mixed tumor with presence of small cell elements
• Has myelodysplastic syndrome (MDS)/acute myeloid leukemia (AML) or has features suggestive of MDS/AML
• Has had documented weight loss >10% (from baseline) in the preceding 3 months
• Has received prior radiotherapy to the thorax, including radiotherapy to the esophagus, mediastinum, or for breast cancer
• Has received prior therapy with an anti-programmed cell death 1 (ant-PD-1), anti-programmed cell death ligand 1 (anti-PD-L1), or anti- programmed cell death ligand 2 (anti-PD-L2) agent or with an agent directed to another stimulatory or co-inhibitory T-cell receptor
• Has received prior therapy with olaparib or with any other polyadenosine 5'diphosphoribose (polyADP ribose) polymerization (PARP) inhibitor
• Has had major surgery <4 weeks prior to the first dose of study treatment (except for placement of vascular access)
• Is expected to require any other form of antineoplastic therapy, while on study
• Has received a live or live attenuated vaccine within 30 days before the first dose of study intervention; administration of killed vaccines is allowed
• Has received colony-stimulating factors (e.g., granulocyte colony-stimulating factor [GCSF], granulocyte-macrophage colony-stimulating factor [GM-CSF] or recombinant erythropoietin) within 28 days prior to the first dose of study treatment
• Is currently receiving either strong (phenobarbital, enzalutamide, phenytoin, rifampicin, rifabutin, rifapentine, carbamazepine, nevirapine and St John's Wort) or moderate (e.g. bosentan, efavirenz, modafinil) inducers of CYP3A4 that cannot be discontinued for the duration of the study
• Is currently receiving either strong (eg, itraconazole, telithromycin, clarithromycin, protease inhibitors boosted with ritonavir or cobicistat, indinavir, saquinavir, nelfinavir, boceprevir, telaprevir) or moderate (eg. ciprofloxacin, erythromycin, diltiazem, fluconazole, verapamil) inhibitors of cytochrome P450 (CYP)3A4 that cannot be discontinued for the duration of the study
• Is unable to interrupt aspirin or other nonsteroidal anti-inflammatory drugs (NSAIDs), other than an aspirin dose ≤1.3 grams per day, for at least 2 days before, during, and for at least 2 days after administration of pemetrexed
• Is unable/unwilling to take folic acid, vitamin B12, and dexamethasone during administration of pemetrexed
• Has received an investigational agent or has used an investigational device within 4 weeks prior to study treatment
• The presence of uncontrolled, potentially reversible cardiac conditions, as judged by the investigator or has congenital long QT syndrome
• Has a diagnosis of immunodeficiency or is receiving chronic systemic steroid therapy or any other form of immunosuppressive therapy within 7 days prior the first dose of study intervention
• Has a known additional malignancy that is progressing or has required active treatment within the past 5 years with the exception of basal cell carcinoma of the skin, squamous cell carcinoma of the skin, superficial bladder cancer, or carcinoma in situ (excluding carcinoma-in situ-of the bladder) that have undergone potentially curative therapy
• Has severe hypersensitivity (≥Grade 3) to study intervention and/or any of its excipients
• Has an active autoimmune disease that has required systemic treatment in past 2 years
• Has a history of (noninfectious) pneumonitis/interstitial lung disease that required steroids or has current pneumonitis/interstitial lung disease
• Has an active infection requiring systemic therapy
• Has a known history of human immunodeficiency virus (HIV) infection
• Has a known history of Hepatitis B or known active Hepatitis C virus infection
• Has active tuberculosis (TB; Mycobacterium tuberculosis) and is receiving treatment
• Has a history or current evidence of any condition, therapy, laboratory abnormality or other circumstance that might confound the results of the study, or interfere with the participant's participation for the full duration of the study, such that it is not in the best interest of the participant to participate, in the opinion of the treating investigator
• Is considered a poor medical risk due to a serious, uncontrolled medical disorder or nonmalignant systemic disease in the opinion of the treating investigator
• Has a known psychiatric or substance abuse disorder that would interfere with the participant's ability to cooperate with the requirements of the study
• Is unable to swallow orally administered medication or has a gastrointestinal disorder affecting absorption
• Has had an allogenic tissue/solid organ transplant

Inclusion Criteria:

1. Has pathologically (histologically or cytologically) confirmed Small Cell Lung Cancer (SCLC). Note: Note: Participants with histology showing a mixed tumor with small cell and non-small cell elements are not eligible. 2. Has Limited-Stage SCLC (Stage I-III, by AJCC 8th Edition Cancer Staging), and can be safely treated with definitive radiation doses. 3. Has no evidence of metastatic disease by whole body positron emission tomography /computed tomography (PET/CT scan), CT or magnetic resonance imaging (MRI) scans 4. Has at least 1 lesion that meets the criteria for being measurable, as defined by Response Evaluation Criteria in Solid Tumors version 1.1 (RECIST 1.1) 5. Has not received prior treatment (chemotherapy or radiotherapy or surgery resection) of LS-SCLC. 6. Is not expected to require tumor resection during the course of the study. 7. Must submit a pre-treatment tumor tissue sample (formalin-fixed, paraffin embedded blocks are preferred to slides) including cytologic sample, if tissue sample unavailable. 8. Has Eastern Cooperative Oncology Group (ECOG) Performance score 0 or 1 assessed within 7 days prior to the first administration of study intervention. 9. Has a life expectancy of at least 6 months. 10. Has adequate organ function. 11. Male and female participants who are not pregnant and of childbearing potential must follow contraceptive guidance during the treatment period and for the time needed to eliminate each study intervention. 12. Male and female participants who are at least 18 years of age at the time of signing the information consent. 13. Male participants must refrain from donating sperm during the treatment period and for the time needed to eliminate each study intervention. 14. Abstains from breastfeeding during the study intervention period and for at least the following period after the last study intervention:
• Pembrolizumab: 120 days
• Olaparib: 7 days

Exclusion Criteria:

1. Has history, current diagnosis, or features suggestive of myelodysplastic syndrome/ acute myeloid leukemia (MDS/AML). 2. Has received prior therapy with an anti-programmed cell death 1 (anti-PD-1), anti-programmed cell death ligand 1 (anti-PDL1), or anti- programmed cell death ligand 2 (anti-PD-L2) agent or with an agent directed to another stimulatory or coinhibitory T-cell receptor 3. Has received prior therapy with olaparib or with any other polyadenosine 5'diphosphoribose (polyADP ribose) polymerization (PARP) inhibitor. 4. Had major surgery <4 weeks prior to the first dose of study intervention (except for placement of vascular access). 5. Is currently participating in or has participated in a study of an investigational agent or has used an investigational device within 4 weeks prior to the first dose of study intervention. 6. Has a diagnosis of immunodeficiency or is receiving chronic systemic steroid therapy (in dosing exceeding 10 mg daily of prednisone equivalent) or any other form of immunosuppressive therapy within 7 days prior the first dose of study intervention. 7. Has a known additional malignancy that is progressing or has required active treatment within the past 5 years. Note: Participants with basal cell carcinoma of the skin, squamous cell carcinoma of the skin, superficial bladder cancer, or carcinoma in situ (e.g., breast carcinoma, cervical cancer in situ) that have undergone potentially curative therapy are not excluded. 8. Has severe hypersensitivity (≥ Grade 3) to study intervention and/or any of its excipients. 9. Has an active autoimmune disease that has required systemic treatment in past 2 years 10. Has a history of (non-infectious) pneumonitis/interstitial lung disease that requires steroids 11. Has an active infection requiring systemic therapy. 12. Has a known history of human immunodeficiency virus (HIV) infection or Hepatitis B or known active Hepatitis C virus infection.

Inclusion Criteria:

• Has previously untreated non-small cell lung cancer (NSCLC) diagnosed by histology or cytology and confirmed as Stage I or II (T1 to limited T3, N0, M0) NSCLC (American Joint Committee on Cancer, AJCC) by chest computed tomography (CT) and positron emission tomography (PET) scan. Participants with pericardium invasion, >2 nodules or 2 nodules that cannot be treated in one field (>2 cm apart and/or total planned target volume [PTV] >163 cc) and diaphragm elevation suggestive of phrenic nerve invasion are excluded
• Cannot undergo thoracic surgery due to existing medical illness(es) as determined by the site's multi-disciplinary tumor board. Medically operable participants who decide to treat with stereotactic body radiotherapy (SBRT) as definitive therapy rather than surgery are also eligible, if patient's unwillingness to undergo surgical resection is clearly documented
• Has a Eastern Cooperative Oncology Group (ECOG) Performance Status of 0, 1, or 2
• Is able to receive SBRT and does not have an ultra-centrally located tumor
• Has adequate organ function within 7 days prior to the start of study treatment
• A female is eligible to participate if she is not pregnant, not breastfeeding, and at least one of the following conditions applies: a) not a women of childbearing potential (WOCBP) OR b) A WOCBP and uses contraceptive method that is highly effective (with a failure rate of <1% per year), or be abstinent from heterosexual intercourse as their preferred and usual lifestyle (abstinent on a long-term and persistent basis), during the intervention period and for at least 120 days after the last dose of pembrolizumab/placebo and 180 days after the last radiotherapy dose
• Male participants are eligible to participate if they agree to the following during the intervention period and for at least 90 days after the last dose of radiotherapy: refrain from donating sperm plus either be abstinent from heterosexual intercourse as their preferred and usual lifestyle (abstinent on a long-term and persistent basis) and agree to remain abstinent or must agree to use contraception per study protocol, unless confirmed to be azoospermic
• Has a radiation therapy plan approved by the central radiation therapy quality assurance vendor

Exclusion Criteria:

• Has received prior therapy with an anti-programmed cell death-1 (anti-PD-1), anti-programmed cell death-ligand 1 (anti-PD-L1), or anti PD-L2 agent or with an agent directed to another stimulatory or co-inhibitory T-cell receptor (e.g. cytotoxic T-lymphocyte-associated antigen 4 [CTLA-4], tumor necrosis factor receptor superfamily member 4 [OX-40], tumor necrosis factor receptor superfamily member 9 [CD137])
• Has received prior radiotherapy to the thorax, including radiotherapy to the esophagus, mediastinum, or breast
• Has received a live vaccine within 30 days prior to the first dose of study intervention
• Has received an investigational agent or has used an investigational device within 4 weeks prior to the first dose of study intervention administration
• Has a diagnosis of immunodeficiency or is receiving chronic systemic steroid therapy (in dosing exceeding 10 mg daily of prednisone equivalent) or any other form of immunosuppressive therapy within 7 days prior the first dose of study treatment
• Has a known additional malignancy that is progressing or has required active treatment within the past 3 years. A prior NSCLC that occurred and was treated curatively at least 2 years prior to the date of the current diagnosis would be considered a separate primary lung cancer, and therefore an additional malignancy. Note: Participants with basal cell carcinoma of the skin, squamous cell carcinoma of the skin, or carcinoma in situ (e.g. breast c carcinoma, cervical cancer in situ) that have undergone potentially curative therapy are not excluded.
• Has a known hypersensitivity (≥Grade 3) to pembrolizumab and/or any of its excipients
• Has a history of (non-infectious) pneumonitis that required steroids or has current pneumonitis
• Has a known history of Hepatitis B or known active Hepatitis C virus infection
• Has an active autoimmune disease that has required systemic treatment in past 2 years, except replacement therapy
• Has an active infection requiring systemic therapy
• Has a known history of human immunodeficiency virus (HIV) infection
• Has a known history of active tuberculosis (TB; Bacillus tuberculosis)
• Is pregnant or breastfeeding or expecting to conceive or father children within the projected duration of the study, starting with the screening visit through 120 days after the last dose of pembrolizumab/placebo and 180 days after the last radiotherapy dose
• Have not adequately recovered from major surgery or have ongoing surgical complications
• Has had an allogenic tissue/solid organ transplant

1. Signed, written informed consent obtained prior to any study procedures. 2. Age > 18 years at the time of informed consent. 3. Metastatic solid tumor with ≥ 25% of tumor cells positive for KK-LC-1 by IHC assay. Due to the low frequency of KK-LC-1 expression in most cancers, screening will focus on gastric, NSCLC, TNBC, and cervix cancers. The IHC test will be performed by the Rutgers Cancer Institute of New Jersey, Department of Biorepository Services. 4. HLA-A*01:01 allele by HLA haplotype test. 5. Measureable disease per RECIST Criteria Version 1.1 at time of enrollment. 6. Prior treatment with cancer type-specific stand of care systemic cancer therapy is required. Standard treatment options must be considered and declined. Documentation of rationale is required if a subject is deemed unsuitable for standard therapy. 7. Subjects with < 3 brain metastases that have been treated with surgery or stereotactic radiosurgery are eligible. Lesions that have been treated with stereotactic radiosurgery must be clinically stable for one month before protocol treatment. Patients with surgically resected brain metastases are eligible. 8. Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1 at screening. 9. Negative pregnancy test for women under 55 and all women who have had a menstrual period in the last 12 months. A pregnancy tests is not required for women who have had a bilateral oophorectomy or hysterectomy. 10. Women of child-bearing potential must agree to use adequate contraception (i.e., intrauterine device, hormonal barrier method of birth control; abstinence; tubal ligation or vasectomy) prior to study entry and for four months after treatment. Should a women become pregnant or suspect she is pregnant while she is participating in this study, she should inform her treating physician immediately. 11. Participants must have organ and marrow function as defined below: 1. Leukocytes > 3,000/mcL 2. Absolute neutrophil count > 1,500/mcL 3. Platelets > 100,000/mcL 4. Hemoglobin > 9.0 g/dL 5. Total bilirubin within normal institutional limits except in participants with Gilbert's Syndrome who must have a total bilirubin < 3.0 mg/dL. 6. Serum AST (SGOT)/ALT (SGPT) < 2.5 x ULN 7. Calculated creatinine clearance (CrCl) >50 mL/min/1.73 m2for participants with creatinine levels above institutional normal (by the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equation). 8. INR or a PTT ≤1.5 X ULN unless the subject is receiving anticoagulant therapy. Subjects on anticoagulant therapy must have a PT or PTT within therapeutic range and no history of severe hemorrhage. 12. Serology:

• HIV antibody negative
• Hepatitis B antigen negative
• Hepatitis C antibody negative or HCV RNC negative (i.e., no current HCV infection) 13. More than four weeks must have elapsed since any prior systemic therapy or radiotherapy at the time the patient receives the KK-LC-1 TCR T cells. Adverse events from prior therapy must have resolved to≤ grade 1 according to CTCAE Version 5 or have demonstrated clinical stability and meet the eligibility criteria for the protocol. 14. Oxygen saturation ≥ 92% on room air. 15. Left ventricular ejection fraction ≥45% by echocardiogram or MUGA for patients 50 years of age or older.

Inclusion Criteria:

The patients must satisfy all of the following inclusion/exclusion criteria in order to be eligible for the study:
• Must have signed and dated written informed consent form in accordance with regulatory and institutional guidelines.
• Males and females aged >18 years at time of consent.
• Histological or cytological confirmed extensive-stage SCLC
• Patients who progressed after at least 1 platinum-based chemotherapy regimen. Patients with platinum resistance (defined as recurrence or progression of disease within 90 days of completion of the platinum-based regimen) are eligible. For phase II, patients also must have been treated with at least one prior line of PD-1/PD-L1 therapy.
• Measurable disease according to RECIST v1.1 (Section 8) obtained by imaging within 28 days prior to study registration.
• Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1 within 14 days before registration and minimum life expectancy of at least 12 weeks.
• Treatment to be initiated at least 2 weeks since last dose of prior systemic anticancer therapy (chemotherapy, radiation, and/or surgery.
• Recovery to grade 1 of any clinically significant toxicity (excluding alopecia, grade 2 fatigue, vitiligo, endocrinopathies on stable replacement therapy) prior to initiation of study drugs.
• Female patients of childbearing potential have a negative pregnancy test at baseline. Females of childbearing potential are defined as sexually mature women without prior hysterectomy or who have had any evidence of menses in the past 12 months. However, women who have been amenorrheic for 12 or more months are still considered to be of childbearing potential if the amenorrhea is possibly due to prior chemotherapy, anti estrogens, or ovarian suppression.
• Women of childbearing potential (i.e., menstruating women) must have a negative urine pregnancy test (positive urine tests are to be confirmed by serum test) documented within 14 days of study registration and within the 24-hour period prior to the first dose of study drug.
• Sexually active women of childbearing potential enrolled in the study must agree to use 2 forms of accepted methods of contraception during the course of the study and for 23 weeks after their last dose of study drug. Effective birth control includes (a) intrauterine device plus 1 barrier method; (b) on stable doses of hormonal contraception for at least 3 months (e.g., oral, injectable, implant, transdermal) plus one barrier method; (c) 2 barrier methods. Effective barrier methods are male or female condoms, diaphragms, and spermicides (creams or gels that contain a chemical to kill sperm); or (d) a vasectomized partner.
• For male patients who are sexually active and who are partners of premenopausal women: agreement to use 2 forms of contraception as in criterion 9b above during the treatment period and for 31 weeks after the last dose of study drug.
• Adequate laboratory values.
• Absolute neutrophil count ≥1,000/µL
• Platelet count ≥100,000/µL
• Hemoglobin ≥9.0 g/dL
• Total bilirubin ≤1.5 x upper limit of normal (ULN) or ≤3 x ULN for subjects with Gilbert's disease
• Alanine aminotransferase (ALT) and aspartate aminotransferase (AST) ≤3.0 x ULN (≤5 x ULN if evidence of hepatic involvement by malignant disease)
• Creatinine ≤ 1.5 x ULN or estimated glomerular filtration rate (eGFR) ≥40 mL/min/1.73m2
• Lipase and Amylase ≤1.5 x ULN. Subjects with Lipase >1.5 x ULN may enroll if there are neither clinical nor radiographic signs of a pancreatitis.

Exclusion Criteria

Patients with any of the following will be excluded from participation in the study.
• Active interstitial lung disease (ILD) or pneumonitis or a history of ILD or pneumonitis requiring treatment with steroids. Prior history of radiation pneumonitis is allowed if pneumonitis was restricted to the field of radiation.
• History of ileus or other significant gastrointestinal disorder known to increase the risk of ileus or chronic bowel hypomotility
• Pregnant or breastfeeding, or expecting to conceive or father children within the projected duration of the trial, starting with the pre-screening or screening visit through 23 weeks (female) or 31 weeks (male) after the last dose of study drug.
• Must not have received CTLA-4 targeted therapy previously
• Treatment with any investigational agent within 28 days prior to registration for protocol therapy. Vaccination for SARS-CoV-2 is allowed as well as any therapy as required for the treatment of active COVID 19 infection.
• Known active symptomatic central nervous system (CNS) metastases and/or carcinomatous meningitis. Patients with neurological symptoms must undergo a head computed tomography (CT) scan or brain magnetic resonance imaging (MRI) to exclude brain metastasis. Patients whose brain metastases have been treated may participate provided there is no evidence of progression for at least 2 weeks after CNS-directed treatment, as ascertained by clinical examination or brain imaging.
• Known history of human immunodeficiency virus (HIV) or active hepatitis B (by surface antigen expression or polymerase chain reaction [PCR]) or active hepatitis C (by PCR) infection. NOTE: HIV testing is not required; Hepatitis B and C testing are required at screening.
• Diagnosis of immunodeficiency or is receiving systemic steroid therapy or any other form of immunosuppressive therapy within 7 days prior to study registration.
• Has active autoimmune disease that has required systemic treatment in the past 2 years (i.e., with use of disease modifying agents, corticosteroids, or immunosuppressive drugs) or a documented history of clinically severe autoimmune disease, or a syndrome that requires systemic steroids or immunosuppressive agents. Vitiligo, alopecia, hypothyroidism only requiring hormone replacement, psoriasis not requiring systemic treatment, celiac disease controlled by diet alone or conditions not expected to recur in the absence of an external trigger are permitted.
• A condition requiring systemic treatment with corticosteroids (>10 mg daily prednisone equivalent) or other immunosuppressive medications within 14 days prior to administration of study drugs.
• History of psychiatric illness or social situations that would limit compliance with study requirements. Has a history or current evidence of any condition, therapy, or laboratory abnormality that might confound the results of the trial, interfere with the patient's participation for the full duration of the trial, or is not in the best interest of the patient to participate, in the opinion of the treating investigator.
• Prior malignancies (except non-melanoma skin cancers, and the following in situ cancers: bladder, gastric, colon, endometrial, cervical/dysplasia, melanoma, or breast) unless a complete remission was achieved at least 2 years prior to study entry.
• Documented history of a cerebral vascular event (stroke or transient ischemic attack), unstable angina, myocardial infarction, or cardiac symptoms consistent with New York Heart Association (NYHA) Class III-IV within 6 months prior to their first dose of study drugs.
• Evidence of ongoing inadequately controlled hypertension (defined as baseline systolic blood pressure >160 mmHg or diastolic blood pressure >100 mmHg).
• Any active grade 3 or higher viral, bacterial, or fungal infection within 2 weeks of the first dose of the study drugs. Routine antimicrobial prophylaxis is permitted.

Inclusion Criteria:

• Written informed consent and HIPAA authorization for release of personal health information. NOTE: HIPAA authorization may be included in the informed consent or obtained separately.
• Age >= 18 years at the time of consent.
• ECOG Performance Status of 0-1 within 28 days prior to registration.
• Patients must have undergone complete surgical resection of their stage I (tumors >= 4cm), IIA, IIB, and select stage III [any T1-3 N1-2 and T4N0-2] NSCLC according to the AJCC 8th edition with negative margins (R0).
• Squamous or non-squamous NSCLC histology. Cancers with a histology of "adenosquamous" are considered a type of adenocarcinoma and thus "non-squamous histology".
• Surgery for this lung cancer must be completed <= 60 days prior to starting treatment.
• Must have tissue available to perform prospective correlative testing. Tissue block is preferred but 10-15 unstained slides (5 μm thick) are also acceptable. If prior PD-L1 results with Dako 22C3 antibody are not available, an additional 5 unstained slides (4 μm thick) must be submitted.
• Demonstrate adequate organ function as defined in the protocol; all screening labs to be obtained within 28 days prior to registration.
• Females of childbearing potential must have a negative serum pregnancy test within 7 days prior to registration NOTE: Females are considered of childbearing potential unless they are surgically sterile (have undergone a hysterectomy, bilateral tubal ligation, or bilateral oophorectomy) or they are naturally postmenopausal for at least 12 consecutive months
• For women of childbearing potential: agreement to remain abstinent (refrain from heterosexual intercourse) or use contraceptive methods, and agreement to refrain from donating eggs, as defined below:
• Women must remain abstinent or use contraceptive methods with a failure rate of < 1% per year during the treatment period and for 5 months after the final dose of atezolizumab.
• A woman is considered of childbearing potential if she is postmenarchal, has not reached a postmenopausal state (> or equal to 12 continuous months of amenorrhea with no identified cause other than menopause), and has not undergone surgical sterilization (removal of ovaries and/or uterus). The definition of childbearing potential may be adapted for alignment with local guidelines or requirements.
• Examples of contraceptive methods with a failure rate of < 1% per year include bilateral tubal ligation, male sterilization, hormonal contraceptives that inhibit ovulation, hormone-releasing intrauterine devices, and copper intrauterine devices.
• The reliability of sexual abstinence should be evaluated in relation to the duration of the clinical trial and the preferred and usual lifestyle of the patient. Periodic abstinence (e.g., calendar, ovulation, symptothermal, or post-ovulation methods) and withdrawal are not acceptable methods of contraception.
• Contraception method must begin starting from the time of informed consent until 5 months after treatment discontinuation.
• For men: Agreement to remain abstinent (refrain from heterosexual intercourse) or use a condom, and agreement to refrain from donating sperm, as defined below:
• With female partners of childbearing potential or pregnant female partners, men must remain abstinent or use a condom during the treatment period and for 5 months after the last dose of study treatment to avoid exposing the embryo. Men must refrain from donating sperm during this same period.
• The reliability of sexual abstinence should be evaluated in relation to the duration of the clinical trial and the preferred and usual lifestyle of the patient. Periodic abstinence (e.g., calendar, ovulation, symptothermal, or post-ovulation methods) and withdrawal are not acceptable methods of contraception.
• As determined by the enrolling physician or protocol designee, ability of the subject to understand and comply with study procedures for the entire length of the study

Exclusion Criteria:

• Tumors that have any component of small cell or large cell neuroendocrine histology are NOT eligible.
• Tumors that are known to harbor EGFR mutations or ALK re-arrangements are NOT eligible.
• Prior chemotherapy, radiation therapy, or immunotherapy is NOT allowed for the treatment of this lung cancer.
• Prior chemotherapy and/or radiation therapy is permissible for the treatment of other previous cancers, but must have been completed at least 3 months prior to registration for this trial.
• Other active cancers.
• History of leptomeningeal disease.
• Prior therapy with an anti-PD-1, anti-PD-L1, or anti-PD-L2 agent or with an agent directed to another stimulatory or co-inhibitory T-cell receptor (e.g., CTLA-4, OX-40, CD137).
• Has received a live vaccine within 30 days prior to the first dose of study drug. Examples of live vaccines include, but are not limited to, the following: measles, mumps, rubella, varicella/zoster (chicken pox), yellow fever, rabies, Bacillus Calmette-Guérin (BCG), and typhoid vaccine. Seasonal influenza vaccines for injection are generally killed virus vaccines and are allowed; however, intranasal influenza vaccines (e.g., FluMist®) are live attenuated vaccines and are not allowed.
• Is currently participating in or has participated in a study of an investigational agent or has used an investigational device within 4 weeks prior to the first dose of study treatment. Note: Participants who have entered the follow-up phase of an investigational study may participate as long as it has been 4 weeks after the last dose of the previous investigational agent.
• Has a diagnosis of immunodeficiency or is receiving chronic systemic steroid therapy (in dosing exceeding 10 mg daily of prednisone equivalent) or any other form of immunosuppressive therapy within 1 week prior to registration.
• Has severe hypersensitivity (>= Grade 3) to atezolizumab and/or any of its excipients.
• History of severe allergic anaphylactic reactions to chimeric or humanized antibodies or infusion proteins.
• Has active or history of autoimmune disease or immune deficiency that includes but is not limited to myasthenia gravis, myositis, autoimmune hepatitis, systemic lupus erythematosus, rheumatoid arthritis, inflammatory bowel disease, antiphospholipid antibody syndrome, Wegener's granulomatosis, Sjögren's syndrome, Guillain-Barré syndrome, or multiple sclerosis.
• Known interstitial lung disease that is symptomatic or may interfere with detection or management of suspected drug-related pulmonary toxicity are not permitted.
• Has a history of (non-infectious) pneumonitis that required steroids or has current pneumonitis.
• Uncontrolled pleural effusion, pericardial effusion, or ascites requiring recurrent drainage procedures (once monthly or more frequently). Patients with indwelling catheters (e.g. PleurX) are allowed.
• Uncontrolled or symptomatic hypercalcemia (ionized calcium >1.5 mmol/L, calcium >12mg/dL or corrected serum calcium >ULN).
• Significant cardiovascular disease within 3 months prior to initiation of study treatment (such as New York Heart Association Class II or greater cardiac disease, myocardial infarction, or cerebrovascular accident), unstable arrhythmia, or unstable angina.
• For patients receiving therapeutic anticoagulation: unstable anticoagulant regimen.
• Has a severe infection within 4 weeks prior to initiation of study treatment, including but not limited to hospitalization for complications of infection, bacteremia, or severe pneumonia.
• Has a known history of Human Immunodeficiency Virus (HIV). Note: HIV testing is not required.
• Has a known history of Hepatitis B or known active Hepatitis C virus infection. Note: If Hepatitis B and Hepatitis C status is unknown, testing is required:
• Subject must have negative total hepatitis B core antibody (HBcAb) test at screening, or positive total HBcAb test followed by a negative hepatitis B virus (HBV) DNA test at screening. The HBV DNA test will be performed only for patients who have a positive total HBcAb test.
• Subject must have negative hepatitis C virus (HCV) antibody test at screening, or positive HCV antibody test followed by a negative HCV RNA test at screening. The HCV RNA test will be performed only for patients who have a positive HCV antibody test. A positive HCV RNA test is sufficient to diagnose active HCV infection in the absence of an HCV antibody test.
• Has a known history of active TB (Bacillus Tuberculosis).
• Prior allogeneic stem cell or solid organ transplantation.
• Has a history or current evidence of any condition, therapy, or laboratory abnormality that might confound the results of the study, interfere with the subject's participation for the full duration of the study, or is not in the best interest of the subject to participate, in the opinion of the treating investigator.
• Has known psychiatric or substance abuse disorders that would interfere with cooperation with the requirements of the trial.
• Is pregnant or breastfeeding or expecting to conceive or father children within the projected duration of the study, starting with the screening visit through 5 months after the last dose of study drug.

Inclusion Criteria:

• Provision of signed and dated written ICF prior to any mandatory and non-mandatory study-specific procedures, sampling and analyses.
• Participant must be ≥18 years (≥ 20 years of age in Japan) at the time of signing the informed consent. All genders are permitted.
• Histologically or cytologically confirmed locally advanced or metastatic NSCLC which is not amenable to curative therapy.
• Must have at least one documented sensitising EGFR mutation: exon19 deletion, L858R mutation, and/or T790M.
• Documented radiologic progression on first- or second-line treatment with osimertinib as the most recent anti-cancer therapy.
• Mandatory provision of FFPE tumour tissue.
• MET overexpression and/or amplification in tumour specimen collected following progression on prior osimertinib treatment.
• Measurable disease as defined by RECIST 1.1.
• Adequate haematological, liver, renal and cardiac functions, and coagulation parameters.
• ECOG performance status of 0 or 1.

Exclusion Criteria:

• Predominant squamous NSCLC, and small cell lung cancer.
• Prior or current treatment with a third-generation EGFR-TKI other than Osimertinib.
• Prior or current treatment with savolitinib or another MET inhibitors.
• Spinal cord compression or brain metastases, unless asymptomatic and are stable.
• History or active leptomeningeal carcinomatosis.
• Unresolved toxicities from any prior therapy greater than CTCAE Grade 1 with the exception of alopecia, haemoglobin ≥ 9.0 g/dL, and Grade 2 prior platinum-therapy related neuropathy.
• Active/unstable cardiac diseases currently or within the last 6 months, clinically significant ECG abnormalities, and/or factors/medications that may affect QTc intervals.
• History of liver cirrhosis of any origin and clinical stage; or history of other serious liver disease or chronic disease with relevant liver involvement.
• Known serious active infection including, but not limited to, tuberculosis, or HIV, HBV or HCV or gastrointestinal disease.
• Receipt of live attenuated vaccine (including against COVID-19) within 30 days prior to the first dose of study intervention.
• Past medical history of ILD, drug-induced ILD, radiation pneumonitis, which required steroid treatment, or any evidence of clinically active ILD.
• Participants currently receiving medications or herbal supplements known to be strong inducers of cytochrome P450 (CYP)3A4 or strong inhibitors of CYP1A2.

Inclusion Criteria:

• The participant (or legally acceptable representative if applicable) must provide written informed consent for the study. The participant may also provide consent for future unspecified research samples. However, the participant may participate in the study without participating in the future unspecified research sample collection. NOTE: Initial informed consent will remain valid throughout the 12-week period between surgical resection and study registration unless, in the opinion of the treating investigator, the participant experiences a significant change in medical or mental status.
• Males and females age ≥ 18 years at the time of consent.
• ECOG Performance Status of 0-1 within 28 days prior to registration.
• Patients must have undergone complete surgical resection of their stage I NSCLC between 4-12 weeks prior to registration and have negative surgical margins (R0).
• NOTE: Both squamous and non-squamous histologies are allowed into the study. Cancers with a histology of "adenosquamous" are considered a type of adenocarcinoma and thus "non-squamous histology".
• NOTE: Staging will be according to the AJCC 8th edition.
• Pathological tumor size must be 1.0 - 4.0 cm in greatest dimension. NOTE: According to AJCC 8th edition, subjects with lepidic predominant adenocarcinoma should be staged based on their invasive tumor size and not their total tumor size (i.e., subjects with lepidic predominant tumors whose invasive tumor size is less than 1 cm are not eligible, even if their total tumor size is 1.0 cm or greater).
• Surgery for this lung cancer must be completed at least 28 days prior to registration.
• Must have either previous NGS and PD-L1 results available using the Dako 22C3 antibody or have archival tissue of surgical specimen from current diagnosis available to perform analyses. If prior PD-L1 results with Dako 22C3 antibody are not available from a CLIA-accredited laboratory, subjects must be able to provide 5 x 5µm unstained slides for prospective analysis to be used for stratification. If NGS results are not available, subjects must be able to provide at least 10 x 10µm unstained and 1 x 4µm H&E slides from current diagnosis for future NGS and/or other genetic analyses.
• Demonstrate adequate organ function as defined in the protocol; all screening labs to be obtained within 28 days prior to registration.
• Females of childbearing potential must have a negative urine or serum pregnancy test within 72 hours prior to registration. If the urine test is positive or cannot be confirmed as negative, a serum pregnancy test will be required. For subjects randomized to the pembrolizumab arm: If there is > 72 hours between the screening test and C1D1, another pregnancy test (urine or serum) must be performed and must be negative before the subject may start C1D1.
• NOTE: Females are considered of childbearing potential unless: they are postmenopausal; are surgically sterile; or they have a congenital or acquired condition that prevents childbearing. See Section 5.1.4 for definitions.
• NOTE: Abstinence is acceptable if this is the usual lifestyle and preferred contraception for the subject.
• A female participant is eligible to participate if she is not pregnant, not breastfeeding, and at least one of the following conditions applies:
• Not a woman of childbearing potential (WOCBP) OR
• A WOCBP who is using a highly effective contraceptive method (failure rate of <1% per year), or is abstinent from heterosexual intercourse as their preferred and usual lifestyle (abstinent on a long term and persistent basis) during the intervention period and for at least 120 days after the last dose of study drug. The investigator should evaluate the potential for contraceptive method failure (i.e., noncompliance, recently initiated) in relationship to the first dose of study drug. See contraceptive guidance in Section 5.1.4 of the protocol.
• As determined by the enrolling physician or protocol designee, ability of the subject to understand and comply with study procedures for the entire length of the study

Exclusion Criteria:

• Current lung cancer is <1 cm or > 4 cm in size or is stage II, III, or IV.
• Patients with tumors that are known to harbor actionable EGFR mutations.
• Prior chemotherapy, radiation therapy, or immunotherapy for the treatment of this lung cancer.
• Has a known active additional malignancy that is progressing or has required active treatment within the past 3 years. NOTE: Participants with basal cell carcinoma of the skin, squamous cell carcinoma of the skin, or carcinoma in situ (e.g., breast carcinoma in situ, cervical cancer in situ) that have undergone potentially curative therapy are not excluded.
• Prior therapy with an anti-PD-1, anti-PD-L1, or anti-PD-L2 agent or with an agent directed to another stimulatory or co-inhibitory T-cell receptor (eg, CTLA-4, OX-40, CD137).
• Has received a live or live-attenuated vaccine within 30 days prior to the first dose of study drug. Administration of killed vaccines is allowed.
• Is currently participating in or has participated in a study of an investigational agent or has used an investigational device within 4 weeks prior to the first dose of study treatment.
• Note: Participants who have entered the follow-up phase of an investigational study may participate as long as it has been 4 weeks after the last dose of the previous investigational agent.
• Has a diagnosis of immunodeficiency or is receiving chronic systemic steroid therapy (in dosing exceeding 10 mg daily of prednisone equivalent) or any other form of immunosuppressive therapy within 7 days prior to randomization.
• Has had an allogenic tissue/solid organ transplant.
• Has severe hypersensitivity (≥Grade 3) to pembrolizumab and/or any of its excipients.
• Has active autoimmune disease that has required systemic treatment in the past 2 years (i.e. with use of disease modifying agents, corticosteroids or immunosuppressive drugs). Replacement therapy (eg., thyroxine, insulin, or physiologic corticosteroid replacement therapy for adrenal or pituitary insufficiency, etc.) is not considered a form of systemic treatment.
• Has a history of (non-infectious) pneumonitis/interstitial lung disease that required steroids or has current pneumonitis/interstitial lung disease.
• Has an active infection requiring systemic therapy.
• Has a known history of Human Immunodeficiency Virus (HIV). Note: HIV testing is not required unless mandated by local health authority.
• Has a known history of Hepatitis B (defined as Hepatitis B surface antigen [HBsAg] reactive) or known active Hepatitis C virus (defined as HCV RNA [qualitative] is detected) infection. Note: Hepatitis B and Hepatitis C testing is not required unless mandated by local health authority.
• Has active TB (Bacillus Tuberculosis) infection.
• Has a history or current evidence of any condition, therapy, or laboratory abnormality that might confound the results of the study, interfere with the subject's participation for the full duration of the study, or is not in the best interest of the subject to participate, in the opinion of the treating investigator.
• Has known psychiatric or substance abuse disorders that would interfere with cooperation with the requirements of the trial.
• Is pregnant or breastfeeding, or expecting to conceive or father children within the projected duration of the study, starting with the screening visit through 120 days after the last dose of trial treatment.