Mystery Crime Thriller
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.
Directed by
Roy William Neill
Morton Lowry
Steward
Basil Rathbone
Sherlock Holmes
Gordon Jackson
Steward (uncredited)
Nigel Bruce
Doctor Watson
Rex Evans
Gregor
Olaf Hytten
Stimson (uncredited)
Rosalind Ivan
Agatha Dunham
Marjorie Riordan
Sheila Woodbury
Martin Kosleck
Mirko
John Abbott
Jodri
Frederick Worlock
Prime Minister
Gerald Hamer
Kingston
William 'Wee Willie' Davis
Gubek
Tom Dillon
Matthias Cherney (uncredited)
Leslie Vincent
Nikolas Watson
James Carlisle
Aide (uncredited)

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