Conrad Veidt
Capt. Andersen

Valerie Hobson
Mrs. Sorensen

Hay Petrie
Axel Skold

Joss Ambler
Lt. Cmdr. Ashton

Raymond Lovell
Van Dyne

Esmond Knight
Mr. Pidgeon

Charles Victor
Hendrick

Harold Warrender
Lt. Cmdr. Ellis

John Longden
Passport officer

Eric Maturin
Passport officer

Leo Genn
First Brother Grimm

Stuart Latham
Second Brother Grimm

Peter Bull
Third Brother Grimm

Olga Edwardes
Mrs. Abo

Manning Whiley
Manager of 'Mousetrap'

Frank Allenby

Patrick Barr
Undetermined Role (uncredited)

Esma Cannon
Erik Skold's Niece

Erik Chitty
Cloakroom Attendant (uncredited)

Cameron Hall
Naval Officer

Bernard Miles
Man Lighting Pipe

Milo O’Shea
Air Raid Warden

Nicholas Phipps
Man in Car

Johnnie Schofield
Waiter at the Cab Drivers Shelter

Michael Shepley
Man in Club

Torin Thatcher
Sailor

Milo O’Shea
Air Raid Warden (uncredited)