The Investigation

A mysterious serial killer is shocking the underworld. Scotland Yard is investigating the case. Clues lead the detectives to Blackwhite Castle.

Both Scotland Yard and an amateur American sleuth are tracking a master criminal known as The Frog. This moniker refers to the bulging-eyed mask worn by the evildoer, and is reflected by the frog icons painfully tatooed onto the forearms of his henchmen. The trail leads to the country manor of an enigmatic, steely-eyed nabob, whose repressed son has eyes for the artistes at the Lolita cabaret, and whose lovely daughter captures the fancy of both the American playboy and the villain himself. Murder, kidnapping and seduction ensue.

A criminal fleeing a bank robbery has a chance encounter with a banker and his wife and takes a locket with both their pictures in it as a remembrance of the wife's stunning beauty. After enlisting for WWI to escape prosecution, his face is disfigured in combat, and plastic surgeons mistakenly give him the banker's face. As the banker is conveniently MIA, it gives the criminal the opportunity to plan a bank heist from the inside and also to get closer to the banker's wife.

Richard Hanney has a rude awakening when a glamorous female spy falls into his bed - with a knife in her back. Having a bit of trouble explaining it all to Scotland Yard, he heads for the hills of Scotland to try to clear his name by locating the spy ring known as The 39 Steps.

Detective Inspector Campbell (Gordon Jackson) looks into the murder of a teacher at a girls school where there are a number of suspects, including her colleagues and the married man she had been seeing.

John Cleese is hilarious as the descendant of Sherlock Holmes in this modern detective drama of international power politics and intrigue. Unlike his illustrious grandfather however, he only succeeds in bungling every job he organizes. Also stars Arthur Lowe as the "bionic" grandson of Dr. Watson, Stratford Johns as the Commissioner of Police, and Connie Booth as Mrs. Hudson.

While treating a policewoman for smoking, hypnotherapist Michael Strother has a telepathic vision of a young girl floating beneath the surface of a stream. The escaped victim of a ritualistic serial killer, the girl has become mute, and Michael is called upon by Scotland Yard to unlock the secrets she holds in order to catch a man who believes he has discovered the key to immortality.

An American doctor and his wife, a former singing star, witness a murder while vacationing in Morocco, and are drawn into a twisting plot of international intrigue when their young son is kidnapped.

London, 1929. Frank Webber, a very busy Scotland Yard detective, seems to be more interested in his work than in Alice White, his girlfriend. Feeling herself ignored, Alice agrees to go out with an elegant and well-mannered artist who invites her to visit his fancy apartment.

Scotland Yard investigators have to prevent the murder of Victoria Dickman when her name is found on a death list.

Rival gangsters from Chicago move to London and attempt to extort money from rich Britons.

Grisly strangulations in London alert Nayland Smith of Scotland Yard to the possibility that fiendish Fu Manchu may not after all be dead, even though Smith witnessed his execution. A killer spray made from Tibetan berries seems to be involved and clues keep leading back to the Thames.

Buster is a small time crook who pulls a big time job. When he finds that the police will not let the case drop, he goes into hiding and can't contact his wife and child. He arranges to meet them in Mexico where he thinks they can begin again, but finds that he must choose between his family and freedom.

Several murders of nuclear scientists, that baffles Scotland Yard, occur in London around the same time that Bill Locklin, a special officer from the United States State Department, arrives to oversee the transfer of Professor Leon Dushenko, a Russian scientist who has fled the USSR. An attempt on Dushenko's life is made with a monkey's paw-print found at the scene.

A hard-nosed Chicago cop is sent to London to bring back an American mobster being held for extradition. Brannigan in his Irish-American way brings American law to the people of Scotland Yard but has to contend with a stuffy old London first.

After an innocent man is executed in a case he was responsible for, a Scotland Yard superintendent finds himself investigating the murder of his key witness.

A British psychiatrist devises a devilish revenge plot against his wife's lover.

Sandra Carpenter is a London-based dancer who is distraught to learn that her friend has disappeared. Soon after the disappearance, she's approached by Harley Temple, a police investigator who believes her friend has been murdered by a serial killer who uses personal ads to find his victims. Temple hatches a plan to catch the killer using Sandra as bait, and Sandra agrees to help.

A madman is on the loose... killing fashion models that appear on the cover of magazines. The police start a manhunt in an attempt to capture the killer.

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.