Jack Hawkins

Supt Tom Halliday

Acting

John Stratton

Sergeant Ward

Acting

Dorothy Alison

Mary Halliday

Acting

Michael Brooke

Tony Halliday

Acting

Sam Kydd

Police Constable in Information Room

Acting

Glyn Houston

Detective Sergeant in 'Q' car

Acting

Richard Leech

Nightwatchman / Gilson

Acting

Newton Blick

Deputy Commander

Acting

Geoffrey Keen

Chief Superintendent Jim Malcolm

Acting

Sydney Tafler

Stone

Acting

Peter Burton

Creasey

Acting

George Rose

Slob

Acting

Arthur Rigby

Detective Inspector at Chester

Acting

Ralph Truman

Colonel Blenkinsop

Acting

Ian Bannen

The Young Workman - Stanley James

Acting

Maureen Davis

The Young Workman's Wife - Mrs. James

Acting

John Warwick

Detective Inspector at Shipping Office

Acting

Joss Ambler

Cashier at Shipping Office

Acting

Barry Keegan

Detective Constable in Hospital Ward

Acting

Alec McCowen

House Surgeon

Acting

Harry Locke

Secondhand Dealer

Acting

Nicholas Parsons

Police Constable Bates

Acting

Warwick Ashton

Newspaper Circulation Manager

Acting

Ursula Howells

Mrs. Elliot / Mrs. Gilson

Acting

David Davies

Welsh Police Constable

Acting

Julie Milton

Welsh Newsagent's Daughter

Acting

Meredith Edwards

Mr. Thomas

Acting

Harold Goodwin

Official at Somerset House

Acting

John Welsh

House Agent at Shepperton

Acting

Gillian Webb

Housewife at Shepperton

Acting

Maureen Delaney

Mrs. Stevens, the daily help

Acting

Jameson Clark

Detective Superintendent Ogilvie

Acting

William Mervyn

Manager of Festival Hall

Acting

Vincent Ball

P.C. at Hospital (uncredited)

Acting

Richard Davies

Detective (uncredited)

Acting

Frazer Hines

Urchin (uncredited)

Acting

Stratford Johns

Constable (uncredited)

Acting

David Lodge

Detective at Car Lot (uncredited)

Acting

Guy Standeven

Detective (uncredited)

Acting

Frederick Treves

Detective tailing Creasey (uncredited)

Acting

Peter Welch

CID Man (uncredited)

Acting

Martin Wyldeck

Officer in Criminal Records Department (uncredited)

Acting

Dennis Carnell

Acting

Edward Cast

Acting

Michael Collins

Acting

Fred Davis

Acting

Jack Dearlove

Acting

Robert Gregory

Acting

Fred Griffiths

Acting

Patrick Halpin

Acting

Aidan Harrington

Acting

George Holdcroft

Acting

Lindsay Hooper

Acting

Arthur Howell

Acting

Colin McKenzie

Acting

Jack McNaughton

Acting

Robert Moor

Acting

Fred Nicholas

Acting

John Paul

Acting

Roy Purcell

Acting

Charles Rayford

Acting

Anthony Richmond

Acting

Pat Ryan

Acting

Philip Stewart

Acting

Meadows White

Acting

John Wilder

Acting

Sonnie Wills

Acting