Detective Frank Webber

Det. Insp. Kent

Richard Sandford

Chief Inspector Lomax

Charles Bentham

Charles Hornblower

Passport officer

Narrator

Inspector Bliss

David / Martin

Joseph Quinney

Jack Meadows

Floquet

Mortimer Digby

Tod Jenkins

Peter Ashton

Worthington

Inspector James

Colonel O'Sullivan

Narrator (voice) (uncredited)

Inspector Thompson

Man With Pipe

Captain Johnson (uncredited)

Raven (uncredited)

Jeremy Meraulton

John Peters, a Pilot

Lieutenant Boris Boriskoff

Admiral

Bill Peel

Himself

Boyfriend

Dean Maitland

Sherlock Holmes

Julian Caesar

Frank Dale

Anthony Xavier 'Tony' Benedik

Stuart Gordon

Police Inspector Merton

Man from China (uncredited)

DI Williams

Mr. Kemp

Commander

Jeffrey

Lt. Stanislaus von Zaminsky

Inspector Wembury

Harry Fielding

Harry Crawford

Hugh Bromilow

Lanchester

Metcalf

Inspector Slade

No. 1

Unnamed Character

Speaker in Connaught Rooms

Prof. Hubbard

Ground Officer (uncredited)

Bill

Jost Meertens

Munch

The Abbot

Detective

Gen. Serpuhousky

Ivan

Le Beau - Illusionist

De La Fayette