Prof. Hubbard
Julian Caesar
Chief Inspector Lomax
Richard Sandford
Detective
Worthington
Speaker in Connaught Rooms
Mr. Kemp
Sherlock Holmes
DI Williams
The Abbot
Inspector James
Captain O'Sullivan
Mortimer Digby
Tod Jenkins
Jost Meertens
Inspector Slade
Metcalf
Ground Officer (uncredited)
Commander
Stuart Gordon
Passport officer
Unnamed Character
Raven (uncredited)
Captain Johnson (uncredited)
John Peters, a Pilot
Inspector Bliss
Inspector Thompson
Det. Insp. Kent
Police Inspector Merton
Peter Ashton
Bill Peel
Dean Maitland
Frank Dale
Hugh Bromilow
Tony Benedik
Harry Crawford
Boyfriend
Harry Fielding
Inspector Wembury
Charles Hornblower
Jeffrey
Lt. Stanislaus von Zaminsky
Lieutenant Boris Boriskoff
Himself
Charles Bentham
Lanchester
Detective Frank Webber
Man from China (uncredited)
No. 1
