Bernard Lee

Chief Inspector Thompson

Richard Attenborough

The Man Upstairs (Peter Watson)

Donald Houston

Sanderson

Dorothy Alison

Mrs. Barnes

Virginia Maskell

Helen Grey

Kenneth Griffith

Mr. Pollen

Patricia Jessel

Mrs. Lawrence

Alfred Burke

Mr. Barnes

Charles Houston

Nicholas

Maureen Connell

Miss Blair

Amy Dalby

Miss Acres

Walter Hudd

The Superintendent

Patrick Jordan

Injured Sergeant

Graham Stewart

Sergeant Morris

Victor Brooks

Sergeant Collins

Edward Judd

P.C. Stevens

Arthur Gross

P.C. Clark

Dan Cressey

P.C. Maclean