Buddy Ebsen Barnaby Jones Actor Lee Meriwether Betty Jones Actor John Carter Lt. John Biddle Actor Mark Shera Jedediah Romano "J.R." Jones Actor Christine Belford Guest Star Scott Marlowe Guest Star Kenneth Tigar Guest Star Earl Boen Guest Star Curt Lowens Guest Star Marie Denn Guest Star Sandra de Bruin Guest Star Charles Walker Guest Star Tawny Moyer Guest Star Dick Nelson Writer Graeme Clifford Director