SERIES PREMIERE: And the unusual summer series keep coming from the broadcast networks. Tonight it’s American Gothic, a title last used for a marvelously dark CBS series starring Gary Cole as a cross between Mayberry Sheriff Andy Taylor and the Devil. This time, also for CBS, it’s a new story, a single-season mystery story. For full reviews, see David Hinckley’s All Along the Watchtower and Ed Bark’s Uncle Barky’s Bytes.