"The Big Mouth" (1967) continues Jerry Lewis' filmmaking decline after his departure from Paramount. Though an improvement over the painfully unfunny "Three on a Couch" (1966), his second Columbia vehicle plays more like a San Diego travelogue than a family-oriented comedy. It's nice to see Jerry revive his "Nutty Professor" persona in a few scenes, but the laugh quotient is low. Surprisingly overrated, "The Big Mouth" never matches the cinematic inventiveness of Lewis' finest efforts.