An American returning home from Baghdad and seeing his girl in Britain on the way agrees to take a message to the secret service. Once in London he is picked up by the gang involved, who have by then killed the original Middle East agent. He escapes, but he and his girl friend are a marked couple as they retreat to Seaford on the south coast to act as bait in an MI5 plan to catch the thugs.

Scotland Yard is thrown into an uproar when a mad killer begins knocking off beautiful young blondes.

A British secret agent sent to America to rescue a nobleman comes up against an evil genius who is replacing people in important positions with clones who will do his bidding.

When a USAF sergeant stationed on a base in England is suspected and then accused of murdering a woman, both he and a local school teacher must race to clear his name and find the real killer.

A blackmailer is murdered, and the police find that there is a long list of suspects who wanted to see him dead.

A composer (Laurence Payne) is stuck in a middle-class marriage and finds that his affair with his wife's half-sister (Jane Griffiths) has resulted in a pregnancy. When his wife refuses to give him a divorce he hatches a murder scheme that is too clever by half.

An English spy (Tom Adams) guards a Scandinavian scientist (Karl Stepanek) who has sold an anti-gravity device to each side.