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)

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)

Campbell Singer

Station Sgt. (uncredited)

George Spence

Pub Patron (uncredited)

Ivan Staff

Edward - Speaker at Hyde Park Corner (uncredited)

Eric Thompson

Garage Pump Attendant (uncredited)

Frederick Treves

Detective at Bank (uncredited)

Mavis Villiers

Drinking Club Blonde (uncredited)

Michael Ward

Pianist (uncredited)

John Warwick

Inspector Jim Moss (uncredited)

Russell Waters

Sgt. - River Police (uncredited)

Henry Webb

Speaking Extra (uncredited)

Meadows White

Alf - Theatre Performer (uncredited)