Pool of London

Bonar Colleano

Dan MacDonald

Susan Shaw

Pat

Renée Asherson

Sally

Earl Cameron

Johnny Lambert

Moira Lister

Maisie

Max Adrian

Charlie Vernon - acrobat / George

Joan Dowling

Pamela, Maisie's sister

James Robertson Justice

Engine Room Officer Trotter

Michael Golden

Customs Officer Andrews

John Longden

Det. Insp. Williams

Alfie Bass

Alf

Christopher Hewett

Mike

Leslie Phillips

Harry

John Adams

Plainclothes Policeman in Squad Car (uncredited)

John Arnatt

Squad Car Officer (uncredited)

Mae Bacon

Ethel the Barmaid (uncredited)

Ian Bannen

Garage attendant (uncredited)

George Benson

George (uncredited)

Arthur Bentley

Pamela's Boyfriend (uncredited)

Beckett Bould

The Murdered Watchman (uncredited)