The present disclosure concerns combination therapy for cancer that utilizes (i) an oncolytic virus; (ii) a virus comprising nucleic acid encoding an immunomodulatory factor, and (iii) at least one cell comprising a chimeric antigen receptor (CAR) specific for a cancer cell antigen. In particular embodiments, the virus comprises nucleic acid encoding an immunomodulatory factor comprises nucleic acid encoding IL-12 and/or antagonist anti-PD-L1 antibody.