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
Wheeler Oakman
— Lieut. Douglas Thompson
Gaston Glass
— Lieut. Rene La Rue
Hans Joby
— Lieut. Baron von Guttard
Forrest Taylor
— Survivor
John S. Peters
— Lt. Baron von Guttard