Doomsday Voyage

A political extremist (John Gabriel, The Curse of the Werewolf), on the run after assassinating a corrupt politician, hastily stows away on a freighter, kidnapping its sole passenger, Katherine Jason (Playboy Playmate Anne Randell, Westworld), the daughter of the ship's Captain (Joseph Cotton, Citizen Kane). After eluding a Coast Guard Officer (James Edwards, Patton), he assures the Captain he will release his daughter unharmed if he's guaranteed safe passage. Captain Jason agrees, and to assure Katherine's safety, keeps the abduction from his men. (official distributor synopsis)