The crew puts on the First Annual Cruise Show, which includes the combined musical talents of Gopher's mother (Ethel Merman), who rekindles a romance with a former movie star (Van Johnson); one of Doc's former in-laws (Ann Miller), who tries to steal the show; Isaac's mom (Della Reese), who is being chased by an ardent suitor (Cab Calloway); and Julie's eccentric Aunt Sylvia (Carol Channing). (thetvdb.com)