Holmes and Watson on a transatlantic ocean liner escorting Nikolas, heir to a foreign throne. Also on board are a number of assassins, plotting against their sovereign.
Basil Rathbone | Sherlock Holmes | |
Nigel Bruce | Doctor Watson | |
Marjorie Riordan | Sheila Woodbury | |
Rosalind Ivan | Agatha Dunham | |
Morton Lowry | Steward | |
Leslie Vincent | Nikolas Watson |
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