Mystery Crime Thriller
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.
Directed by
Charles Frend
Arthur Rigby
Detective Inspector at Chester
John Stratton
Sergeant Ward
John Paul
Guy Standeven
Detective (uncredited)
Martin Wyldeck
Officer in Criminal Records Department (uncredited)
Jack Hawkins
Supt Tom Halliday
Vincent Ball
P.C. at Hospital (uncredited)
Ursula Howells
Mrs. Elliot / Mrs. Gilson
Geoffrey Keen
Chief Superintendent Jim Malcolm
Ian Bannen
The Young Workman - Stanley James
Alec McCowen
House Surgeon
Ralph Truman
Colonel Blenkinsop
George Rose
Slob
Richard Leech
Nightwatchman / Gilson
Frazer Hines
Urchin (uncredited)
John Welsh
House Agent at Shepperton
Meredith Edwards
Mr. Thomas
Fred Griffiths
Dorothy Alison
Mary Halliday
Stratford Johns
Constable (uncredited)
Harold Goodwin
Official at Somerset House
Glyn Houston
Detective Sergeant in 'Q' car
William Mervyn
Manager of Festival Hall
Harry Locke
Secondhand Dealer
Joss Ambler
Cashier at Shipping Office
Nicholas Parsons
Police Constable Bates
Peter Burton
Creasey
David Lodge
Detective at Car Lot (uncredited)
Jameson Clark
Detective Superintendent Ogilvie
Sam Kydd
Police Constable in Information Room
Richard Davies
Detective (uncredited)
Sydney Tafler
Stone
Robert Moor
Jack McNaughton
Maureen Delaney
Mrs. Stevens, the daily help
Michael Brooke
Tony Halliday
Newton Blick
Deputy Commander
Maureen Davis
The Young Workman's Wife - Mrs. James
John Warwick
Detective Inspector at Shipping Office
Barry Keegan
Detective Constable in Hospital Ward
Warwick Ashton
Newspaper Circulation Manager
David Davies
Welsh Police Constable
Julie Milton
Welsh Newsagent's Daughter
Gillian Webb
Housewife at Shepperton
Frederick Treves
Detective tailing Creasey (uncredited)
Peter Welch
CID Man (uncredited)
Dennis Carnell
Edward Cast
Michael Collins
Fred Davis
Jack Dearlove
Robert Gregory
Patrick Halpin
Aidan Harrington
George Holdcroft
Lindsay Hooper
Arthur Howell
Colin McKenzie
Fred Nicholas
Roy Purcell
Charles Rayford
Anthony Richmond
Pat Ryan
Philip Stewart
Meadows White
John Wilder
Detective (uncredited)
Sonnie Wills

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