Mike Connors Joe Mannix Actor Gail Fisher Peggy Fair Actor John Vernon James Dexter Guest Star Janette Lane Bradbury Karin Gundersen Guest Star Paul Fix Johnny Gundersen Guest Star Rex Holman Angel Guest Star Ward Wood Lt. Art Malcolm Guest Star Ivor Barry Duke of Wallingford Guest Star Jean Byron Helen Guest Star Byron Morrow T.D. Simonson Guest Star Russ Conway Captain Briskin Guest Star Dick Ziker Mannix imposter Guest Star Critt Davis Customs Officer Guest Star Maureen Leeds PA Voice Guest Star Troy Melton Harvey Grant Guest Star Leslie H. Martinson Director Stephen Kandel Writer