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