 Towards the end of the movie, Herman (Fred Gwynne (qv)) and  Grandpa (Al Lewis (III) (qv)) are shouting for help. Herman says,  "Call Batman," then adds, "Car 54, where are you?"  _"Car 54, Where Are You?" (1961)_ (qv) was the title of a 1961  comedy series that featured both Gwynne and Lewis.