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