Classic British crime drama directed by Basil Dearden. After being called to the scene of an armed robbery, veteran PC George Dixon (Jack Warner) is shot and killed by young criminal Tom Riley (Dirk Bogarde) while new recruit Andy Mitchell (Jimmy Hanley) can only look on in horror. With word soon getting out of the popular policeman's murder, some of the West London criminal fraternity join forces with Mitchell and his colleagues and set out on a hunt to find the killer.

First of the Ealing comedies. A bunch of crooks use a comic paper, featuring stories penned by Felix H. Wilkinson (Alastair Sim), to pass on coded messages for robberies. When the comic's readership, a bunch of East End boys, discover what's going on they go to the police. The local constabulary, however, are no help, and so the plucky lads set out to foil the robbers themselves.