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

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