Directed by: John Rawlins
Starring: Basil Rathbone, Nigel Bruce, Evelyn Ankers, Reginald Denny
Continuity mistake: At the end of the movie, Meade and the other Nazis hide inside a church. In the first shot of the church's interior, Schiller is searching for something in a coat he's holding. In the next shot, his hands are suddenly controlling the radio. The shot changes, and Schiller is holding the coat again. (00:54:32)
Doctor Watson: ...But Holmes, that's impossible.
Sherlock Holmes: Anything is possible until proven otherwise.
Trivia: Henry Daniell, who plays Sir Anthony Lloyd, played several characters in the Basil Rathbone saga, including Professor Moriarty.