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.

Starring:

Alan Edmiston, Ashley Cowan, Basil Rathbone, Charles Millsfield, Curt Furburg, Ernst Brengt, Frederick Worlock, George Leigh, Gerald Hamer, Gregory Gaye, James Carlisle, James Craven, John Abbott, John Dutra, Joseph Marievsky, Leslie Vincent, Marjorie Riordan, Martin Kosleck, Morton Lowry, Nigel Bruce, Olaf Hytten, Rex Evans, Rosalind Ivan, Sayre Dearin

Genre:

Adventure, Crime, Mystery