Thirty years ago, Crystal wore aging makeup to play this role on film. He doesn't need it anymore, but he never really did: He has Buddy in his bones. Crystal has been playing this alter kocker alter ego since at least Saturday Night Live in 1985, and Buddy's type of Catskills-and-Friars-Club cut-up is embedded in his comic style: He has deep affection and respect for the generation of comedians that Buddy represents, and he keeps their spirit alive in his timing, his rhythms, his soulful aggression. ('Happy anniversary. Forty-five years!' Buddy tells his wife. 'Eleven of the best years of my life.') In Mr. Saturday Night he honors their history with a sweet, slight, nostalgic musical comedy.