Inclusion Criteria:

          -  Patient is > 18 years of age at the time the Informed Consent is signed.

          -  Patient has a pathologically confirmed diagnosis of either Malignant
             Pleural/Peritoneal Mesothelioma (MPM), Serous Ovarian Adenocarcinoma,
             Cholangiocarcinoma, or Non-Small Cell Lung Cancer (NSCLC).

          -  Patient's tumor has been pathologically reviewed by the central laboratory with
             confirmed positive MSLN expression on > 50% of tumor cells that are 2+ and/or 3+ by
             immunohistochemistry.

          -  Prior to gavo-cel infusion, patients must have received at least 1 systemic standard
             of care therapy for metastatic or unresectable disease with more details provided in
             the clinical protocol

          -  Patient has an Eastern Cooperative Oncology Group performance status 0 or 1.

          -  Patient has a left ventricular ejection fraction > 45% as measured by resting
             echocardiogram, with no clinically significant pericardial effusion.

          -  Patient is fit for leukapheresis and has adequate venous access for the cell
             collection.

          -  Patient must have adequate organ function as indicated by the laboratory values in the
             clinical protocol