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