Sherlock Holmes and the Voice of Terror

Sherlock Holmes and the Voice of Terror is the third film in the Basil RathboneNigel Bruce series of Sherlock Holmes movies. Made in 1942, the film combines elements of the Arthur Conan Doyle story His Last Bow, to which it is credited as an adaptation, and loosely parallels the reallife activities of Lord Hawhaw. Horror film scream queen Evelyn Ankers appears as leading lady.

Holmes is called into the Inner Council of British Intelligence by Sir Evan Barham Reginald Denny, to assist in stopping Nazi saboteurs operating in Britain, whose activities are announced in advance in radio broadcasts by The Voice of Terror.Gavin Robert Barron, one of Holmess operatives, is killed with a German dagger in his back. Before he dies, Gavin utters the word Christopher. Later, Holmes and Watson go to the Limehouse district of London, where they meet with Gavins wife Kitty Evelyn Ankers. ........

Source: Wikipedia