8 p.m. Thursday, Fox Back-to-back episodes wrap up Season 3, but not on its regular night. That's a mystery, but what's easy to explain is how wonderfully wacky and enjoyable this sitcom can be. In tonight's first episode, Burt (Garret Dillahunt, right in photo with Chicago native Lucas Neff in center) learns from his parents (Shirley Jones and Lee Majors) that he actually is Jewish, so he takes a musical crash course in his heritage to prepare for his Bar Mitzvah. Then, Burt and Barney take a road trip on Mother's Day to Maw Maw's childhood home and discover that her mother may still be alive. That means double the Cloris Leachman, so you know it'll be double the fun.