Besetzung
John Stratton
Sergeant Ward
Glyn Houston
Detective Sergeant in 'Q' car
David Davies
Welsh Police Constable
Harold Goodwin
Official at Somerset House
Stratford Johns
Constable (uncredited)
Peter Welch
CID Man (uncredited)
Martin Wyldeck
Officer in Criminal Records Department (uncredited)
Peter Burton
Creasey
Nicholas Parsons
Police Constable Bates
Roy Purcell
George Rose
Slob
Ralph Truman
Colonel Blenkinsop
Richard Davies
Detective (uncredited)
Frazer Hines
Urchin (uncredited)
Fred Davis
Sydney Tafler
Stone
Barry Keegan
Detective Constable in Hospital Ward
John Paul
Maureen Davis
The Young Workman's Wife - Mrs. James
Joss Ambler
Cashier at Shipping Office
Robert Moor
Dorothy Alison
Mary Halliday
Maureen Delaney
Mrs. Stevens, the daily help
Frederick Treves
Detective tailing Creasey (uncredited)
Harry Locke
Secondhand Dealer
Ian Bannen
The Young Workman - Stanley James
Meredith Edwards
Mr. Thomas
Fred Griffiths
George Holdcroft
Geoffrey Keen
Chief Superintendent Jim Malcolm
Jameson Clark
Detective Superintendent Ogilvie
William Mervyn
Manager of Festival Hall
Jack Hawkins
Supt Tom Halliday
Pat Ryan
Sam Kydd
Police Constable in Information Room
Alec McCowen
House Surgeon
Jack McNaughton
Meadows White
Richard Leech
Nightwatchman / Gilson
Arthur Rigby
Detective Inspector at Chester
John Welsh
House Agent at Shepperton
Vincent Ball
P.C. at Hospital (uncredited)
David Lodge
Detective at Car Lot (uncredited)
Guy Standeven
Detective (uncredited)