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

Leslie Phillips

Harry

Alfie Bass

Alf

John Longden

DI Williams

Michael Golden

Customs Officer Andrews

Christopher Hewett

Mike

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)

John Boxer

Detective in Pub (uncredited)

Michael Corcoran

Sam (uncredited)

Arthur Cortez

Jock (uncredited)

Dan Cressey

Customs Officer (uncredited)

David Davies

Officer on the Dunbar (uncredited)

Frank Forsyth

Police Constable Witnessing Robbery (uncredited)

Rowena Gregory

Mary (uncredited)

Fred Griffiths

Sailor on Barge (uncredited)

Pat Hagan

Squad Car Officer (uncredited)

Ellis Irving

Superintendent (uncredited)

Sam Kydd

2nd Engineer (uncredited)

Howard Lang

Detective Detaining Suspect (uncredited)

James Liggat

Bit Part (uncredited)

Victor Maddern

First Tram Conductor (uncredited)

Jack May

Sailor on the Dunbar (uncredited)

George Merritt

Captain of Dunbar (uncredited)

Arthur Mullard

Seaman on the Dunbar (uncredited)

Laurence Naismith

Commissionaire (uncredited)

Paul Rich

Singer in Pub (uncredited)

Jack Sharp

Dock Worker (uncredited)