The only Sherlock Universal not directed by Roy William Neill - who is the Voice Of Terror? They tell you. When Sherlock hears the Voice of Terror broadcast along with the security council, he goes home & calls up the BBC radio station to get them to play Beethoven's 5th. The voice of the BBC is the same as the VOICE of TERROR broadcast. What this means to the story I'll leave you to decide. That BBC voice sounded German ndai. Definitely not British.
