After the King of Rovenia has been assassinated, Holmes and Watson are engaged to escort his son to Europe via Algiers, aboard a transatlantic ocean liner which also carries a number of suspicious persons, any of whom may be involved in a plot to also assassinate him.
Cast
Basil Rathbone
Sherlock Holmes
Nigel Bruce
Doctor Watson
Marjorie Riordan
Sheila Woodbury
Rosalind Ivan
Agatha Dunham
Morton Lowry
Steward
Leslie Vincent
Nikolas Watson
Martin Kosleck
Mirko
Rex Evans
Gregor
John Abbott
Jodri
Gerald Hamer
Kingston
William 'Wee Willie' Davis
Gubek
Frederick Worlock
Prime Minister
Tom Dillon
Matthias Cherney (uncredited)
James Carlisle
Aide (uncredited)
Olaf Hytten
Stimson (uncredited)
Gordon Jackson
Steward (uncredited)
Crew
Roy William Neill
Director, Producer
Leonard Lee
Screenplay
Saul A. Goodkind
Editor
Paul Ivano
Director of Photography
Howard Benedict
Executive Producer
Vera West
Costume Design
Jack Pierce
Makeup Department Head
Bernard B. Brown
Sound Director
Russell A. Gausman
Set Decoration
Ralph Sylos
Set Decoration
Arthur Conan Doyle
Characters
John B. Goodman
Art Direction
Martin Obzina
Art Direction
