
The Long Arm
The True Inside Story of Scotland Yard's Crime Busters!
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.
Director Charles Frend
Cast

Sydney Tafler
Stone

Barry Keegan
Detective Constable in Hospital Ward

Nicholas Parsons
Police Constable Bates

William Mervyn
Manager of Festival Hall

Richard Davies
Detective (uncredited)

Geoffrey Keen
Chief Superintendent Jim Malcolm

Jack McNaughton

Jack Hawkins
Supt Tom Halliday

Richard Leech
Nightwatchman / Gilson

Frazer Hines
Urchin (uncredited)

Peter Welch
CID Man (uncredited)

Roy Purcell

Pat Ryan

Ian Bannen
The Young Workman - Stanley James

Maureen Delaney
Mrs. Stevens, the daily help

Ralph Truman
Colonel Blenkinsop

Dorothy Alison
Mary Halliday

Sam Kydd
Police Constable in Information Room

George Holdcroft

Glyn Houston
Detective Sergeant in 'Q' car

Harry Locke
Secondhand Dealer

Peter Burton
Creasey

George Rose
Slob

Alec McCowen
House Surgeon

Joss Ambler
Cashier at Shipping Office

Meredith Edwards
Mr. Thomas

Harold Goodwin
Official at Somerset House

Fred Griffiths

Martin Wyldeck
Officer in Criminal Records Department (uncredited)

David Davies
Welsh Police Constable

David Lodge
Detective at Car Lot (uncredited)

Arthur Rigby
Detective Inspector at Chester

Jameson Clark
Detective Superintendent Ogilvie

Guy Standeven
Detective (uncredited)

John Paul

Vincent Ball
P.C. at Hospital (uncredited)

Stratford Johns
Constable (uncredited)

Robert Moor

John Stratton
Sergeant Ward

Maureen Davis
The Young Workman's Wife - Mrs. James

John Welsh
House Agent at Shepperton