Overview
Aircraft are being shot down by a large black plane with a big "X" painted on the wing. The chief suspects are invited for the weekend to an old dark mansion.
Cast
- John Carroll as Jerry Blackwood
- Lona Andre as Helen Gage
- John Elliott as Doctor Norris
- Henry Hall as Henry Goering
- Leon Ames as Carl Goering
- Willard Kent as Inspector Gallagher
- Pat Somerset as Capt. Roland Saunders
- Reed Howes as Lieut. John Ives
- Wheeler Oakman as Lieut. Douglas Thompson
- Gaston Glass as Lieut. Rene La Rue