A request by Scotland Yard inspector Gordon Jackson for help from the now retired Sherlock Holmes about some very mysterious deaths of men being found in the Thames River brings the famous detective back to Baker Street. The celebrated detective and his companion Dr. John Watson now spend a lot of their time in the countryside just gathering their notes together for the ultimate Holmes memoir.
The Masks Of Death brings Peter Cushing to his second portrayal of Sir Arthur Conan Doyle's famous sleuth. He had previously played him in the Hammer Film production of The Hound Of The Baskervilles. In this film John Mills is Doctor Watson who also narrates.
The Masks Of Death is not based on any Conan Doyle story and the reason is pretty clear. After Holmes and Watson go to work on this case, the Home Secretary played by Ray Milland asks for Holmes's help in a case of national importance. Accompanying Milland is German gentleman Anton Diffring. They allege that a prince of the royal Hohenzollern blood has been kidnapped while traveling incognito in Great Britain. We've got to find him before anything else period. Milland plays a member of the cabinet who wants to stop an impending German/British war at all costs.
In fact in the cabinet of Herbert Asquith back in the day, the Minister for War, Lord Haldane was a man doing just that and his pro-German views were the basis for his dismissal. I doubt Arthur Conan Doyle would have been libeling Lord Haldane back in those days. And it would have been libel for what eventually Holmes uncovers.
Baker Street purists will scoff at this one. It wasn't however a bad film for Peter Cushing. Anne Baxter is on hand as well in one of her last roles as a mysterious German/American woman who Holmes can't quite trust. He suspects, heaven forfend, she's a suffragist.
What the two cases have in common might surprise the viewer. If carried out it would have been the crime of the last century.