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.

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.

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.

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.

A masked killer is stalking and killing Londoners outside a nightclub.

A glamour model helps Scotland Yard to catch a criminal gang.

A Scotland Yard investigator looks into four mysterious cases involving an unoccupied house.

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

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.

A newlywed fears she's going mad when strange things start happening at the family mansion.

Eccentric consulting detective Sherlock Holmes and Doctor John Watson battle to bring down a new nemesis and unravel a deadly plot that could destroy England.

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.