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