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