British agent Bulldog Drummond is assigned to stop a master criminal who uses beautiful women to do his killings.

Charles Dobbs is a British secret agent investigating the apparent suicide of Foreign Office official Samuel Fennan. Dobbs suspects that Fennan's wife, Elsa, a survivor of a Nazi Germany extermination camp, might have some clues, but other officials want Dobbs to drop the case. So Dobbs hires a retiring inspector, Mendel, to quietly make inquiries. Dobbs isn't at all sure as there are a number of anomalies that simply can't be explained away. Dobbs is also having trouble at home with his errant wife, whom he very much loves, having frequent affairs. He's also pleased to see an old friend, Dieter Frey, who he recruited after the war. With the assistance of a colleague and a retired policeman, Dobbs tries to piece together just who is the spy and who in fact assassinated Fennan.

A safecracker turns double agent during WWII.

Those who have interfered with the Tomb of Ra-Antef are in terrible danger. Against expert advice, American showman and financial backer of the expedition, Alexander King, plans a world tour exhibiting this magnificent discovery from the ancient world but on the opening night the sarcophagus is void of its contents. The mummy has escaped to fulfill the dreadful prophesy and exact a violent and bloody revenge on all those who defiled his final resting place.

When the detective in charge of investigating a series of bank robberies starts to get too close to the culprits, they set up a blackmail scheme to warn him off. But when the crooks begin to fall out with each other, the police learn the truth.

A gang of aspiring bank robbers involve themselves with arsonists and purchase their very own fire truck in an attempt to create the ultimate diversion. But posing as firemen leads them to disaster.

Naive Stanley Windrush returns from the war, his mind set on a successful career in business. Much to his own dismay, he soon finds he has to start from the bottom and work his way up, and also that the management as well as the trade union use him as a tool in their fight for power.

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.