John (Alan Ladd), a blacksmith and swordsmith, is tutored at Camelot. As a commoner, he can't hope to win the hand of Lady Linet (Patricia Medina), daughter of the Earl of Yeoniland (Harry Andrews), so he creates a secret alternate identity as the Black Knight. In this new role, he is now able to help King Arthur when Saracens and Cornish men—disguised as Vikings -- plot to take over the country.
Action-packed espionage thriller based on a book by Mickey Spillane. A man who has been framed for a large-scale robbery escapes from prison, but is caught and given a choice between returning behind bars and working for the CIA. He is enlisted to rescue a scientist from a dictator-run island, disguised as a drug dealer with another agent posing as his wife, while simultaneously plotting to prove his innocence.