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.
as Supt Tom Halliday
as Sergeant Ward
as Mary Halliday
as Tony Halliday
as Police Constable in Information Room
as Detective Sergeant in 'Q' car
as Nightwatchman / Gilson
as Deputy Commander
as Chief Superintendent Jim Malcolm
as Stone
as Creasey
as Slob
as Detective Inspector at Chester
as Colonel Blenkinsop
as The Young Workman - Stanley James
as The Young Workman's Wife - Mrs. James
as Detective Inspector at Shipping Office
as Cashier at Shipping Office
as Detective Constable in Hospital Ward
as House Surgeon
as Secondhand Dealer
as Police Constable Bates
as Newspaper Circulation Manager
as Mrs. Elliot / Mrs. Gilson
as Welsh Police Constable
as Welsh Newsagent's Daughter
as Mr. Thomas
as Official at Somerset House
as House Agent at Shepperton
as Housewife at Shepperton
as Mrs. Stevens, the daily help
as Detective Superintendent Ogilvie
as Manager of Festival Hall
as P.C. at Hospital (uncredited)
as Detective (uncredited)
as Urchin (uncredited)
as Constable (uncredited)
as Detective at Car Lot (uncredited)
as Detective (uncredited)
as Detective tailing Creasey (uncredited)
as CID Man (uncredited)
as Officer in Criminal Records Department (uncredited)
as Detective (uncredited)
