Originally titled "Silver Blaze" in 1937 Britain, this first outing of Arthur Wontner as Sherlock Holmes has he and Watson travelling to the home of their old friend Henry Baskerville who needs Holmes to determine who made off with his prized race horse Silver Blaze and murdered the groom. The primary suspect is the young rider who loves Baskerville's daughter, but he seems innocent of the deed. Holmes finds the horse on a neighboring farm and deduces that his arch-enemy Professor Moriarity is behind the mayhem.