One of the most successful sitcoms from Danny Thomas's producing arm, it ran for five successful years on ABC. Part of the charm was the cornpone theme by songwriting legend Harry Ruby. But when a contract dispute and a change of networks prompted multiple cast members to exit the show, the lyrics were revised in season six, which might have been a mistake. After hearing the song every week for five years fans now heard lyrics that, because only two real McCoys were left on the show, were reduced to introducing the hired help and the guy next door. It sounded clumsy and awkward, as did the cheesy closing credits arrangement which sounds like it belongs on a cartoon show. You'll hear both the classic theme and the unfortunate rewrite on this video.