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