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

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