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