Drummond goes up against foreign agents who are trying to steal plans for a top-secret aircraft.
John Lodge
as Hugh "Bulldog" Drummond
Dorothy Mackaill
as Doris Thompson
Victor Jory
as Gregoroff
Claud Allister
as Algy Longworth
Richard Bird
as Caldwell
Hugh Miller
as Ivan Kalinsky
Leslie Perrins
as Major Grayson
Brian Buchel
as Meredith
Jim Gérald
as Veight
Maire O'Neill
as Norah
Annie Esmond
as Mrs. Caldwell
Frank Cochrane
as Dr. Belfrus
