
The Long Arm
The True Inside Story of Scotland Yard's Crime Busters!
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

Vincent Ball
P.C. at Hospital (uncredited)

David Lodge
Detective at Car Lot (uncredited)

Meredith Edwards
Mr. Thomas

Peter Welch
CID Man (uncredited)

Sydney Tafler
Stone

Peter Burton
Creasey

John Welsh
House Agent at Shepperton

Arthur Rigby
Detective Inspector at Chester

Jack Hawkins
Supt Tom Halliday

John Stratton
Sergeant Ward

Maureen Delaney
Mrs. Stevens, the daily help

George Holdcroft

William Mervyn
Manager of Festival Hall

Barry Keegan
Detective Constable in Hospital Ward

Richard Davies
Detective (uncredited)

Jack McNaughton

Fred Griffiths

Nicholas Parsons
Police Constable Bates

Dorothy Alison
Mary Halliday

Alec McCowen
House Surgeon

Robert Moor

Pat Ryan

Sam Kydd
Police Constable in Information Room

Ralph Truman
Colonel Blenkinsop

Harry Locke
Secondhand Dealer

Stratford Johns
Constable (uncredited)

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

Jameson Clark
Detective Superintendent Ogilvie

Meadows White

David Davies
Welsh Police Constable

Fred Davis

Richard Leech
Nightwatchman / Gilson

John Paul

Geoffrey Keen
Chief Superintendent Jim Malcolm

Frederick Treves
Detective tailing Creasey (uncredited)

Martin Wyldeck
Officer in Criminal Records Department (uncredited)

George Rose
Slob

Ian Bannen
The Young Workman - Stanley James

Joss Ambler
Cashier at Shipping Office

Harold Goodwin
Official at Somerset House

Glyn Houston
Detective Sergeant in 'Q' car

Frazer Hines
Urchin (uncredited)

Guy Standeven
Detective (uncredited)

Roy Purcell