The Long Arm
movie

The True Inside Story of Scotland Yard's Crime Busters!
Released June 01, 1956
Overview
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
as
Supt Tom Halliday

John Stratton
as
Sergeant Ward

Dorothy Alison
as
Mary Halliday
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Michael Brooke
as
Tony Halliday

Sam Kydd
as
Police Constable in Information Room

Glyn Houston
as
Detective Sergeant in 'Q' car

Richard Leech
as
Nightwatchman / Gilson
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Newton Blick
as
Deputy Commander

Geoffrey Keen
as
Chief Superintendent Jim Malcolm

Sydney Tafler
as
Stone

Peter Burton
as
Creasey

George Rose
as
Slob
Crew

Charles Frend
as
Director
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Gerard Schurmann
as
Original Music Composer
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Gordon Dines
as
Director of Photography
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Harry Frampton
as
Makeup Artist
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Daphne Martin
as
Hairstylist
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Thomas N. Morahan
as
Associate Producer
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Edward Carrick
as
Art Direction
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Anthony Mendleson
as
Costume Design
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Roy Gough
as
Still Photographer

Janet Green
as
Screenplay
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Robert Barr
as
Screenplay

Michael Balcon
as
Producer