Frederick Piper

Lodger

Ex-Admiral

Aged Parent

Police Inspector Merkot

Usher

Hubert Wing

Mr. Wallingford

Monk (uncredited)

Tom Bridges

Siddall

Gonzalez (The Traitor)

Mr. Davies

Hearse Driver

Sgt. Bob Ogle

Sam

Scientist in Corridor

Fred

Small Man

Harvey Walters

Hall Porter (uncredited)

Inspector Malcolm

Barman

Careers Officer

Potter

Ernest (uncredited)

Mr. Poldy

Henry Beamster

Medwood Inspector Hayman

Spanish

Sandyman

Jeweller

Lukey

Joe Bates

Thomas Pritchard

Mr. Easter (uncredited)

Inspector Reid

Customs Inspector

Mr. Sykes

Solicitor Petheridge

Alf Lewis

Garland

Max Marshall

Yokel

Mr. Bentley

Billy Hapgood

Labourer

Camp Caretaker

Policeman

Brownie

Miller

Detective Sergeant Leech

Det. Insp. Godby

Ben Pickersgill

Isaac Turk

Mr. Kirby

Dr. Pepper

Zacky Penrose

Sgt. Fred Johnson

Auctioneer

Learoyd

Boatswain W.E. Fletcher - M.V. San Demetrio

Police Sergeant (uncredited)

Sailor

Banger Hill

Edgecombe

Malta official (uncredited)

David

Ginger Harris

Pickpocket (uncredited)

Davis

Bartender (Uncredited)

Ledbetter

Mr. Green (The Recording Engineer)

Minor Role

Jimmy (Employment Clerk)

Policeman Denker

Joe, Detective Taking Fingerprints

Arthur Stevens

Gendarme

The Milkman (uncredited)

Policeman with Rifle (uncredited)

Mr. McWilliams