
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



















