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.
John Carroll
Jerry Blackwood
Lona Andre
Helen Gage
John Elliott
Doctor Norris
Henry Hall
Henry Goering
Leon Ames
Carl Goering
Willard Kent
Inspector Gallagher
Pat Somerset
Capt. Roland Saunders
Reed Howes
Lieut. John Ives
