While sailing lawfully up the Yangste in 1949, the British warship Amethyst found its return to the open sea blocked by Communist Chinese shore batteries that unexpectedly opened fire. In charge, Lietenant Commander Kerans was not however prepared for his crew and his ship to remain as a hostage for the Chinese to use as an international pawn.

Scotland Yard detectives attempt to solve a spate of safe robberies across England beginning with clues found at the latest burglary in London. The film is notable for using a police procedural style made popular by Ealing in their 1950 film The Blue Lamp. It is known in the US as The Third Key.

Meet Ellen Sheppard, an American living in Britain. Her English husband, Jason Sheppard, has been killed and she's under suspicion despite the appearance of a happy marriage. Jason's friend assists Ellen go over the facts to see if they can find the real killer.

A group of army personnel and nurses attempt a dangerous and arduous trek across the deserts of North Africa during the second world war. The leader of the team dreams of his ice cold beer when he reaches Alexandria.