Burt's parents (Guest stars Shirley Jones and Lee Majors) come to town with the surprising news that he actually is Jewish. So Burt takes a musical crash course in his newfound heritage to prepare for the Bar Mitzvah he never had. Then, it's a Mother's Day to remember as Burt and Barney take a road trip to Maw Maw's childhood home and discover that her mother may still be alive. Multiple generations of crazy gather under one roof.