"Betrayal and espionage abound as an experimental aircraft is readied for its maiden voyage."
Peter Lorre
as Colonel Gimpy
Brian Donlevy
as Ace Martin
Helen Wood
as Ruth Franklin
Ralph Morgan
as John R. Flemyng
Thomas Beck
as Joe Randall
Kay Linaker
as Mrs. Fleming
Lester Matthews
as Sidney Grant
Earle Foxe
as Operative #30
J. Carrol Naish
as Operative #77
Gloria Roy
as Operative #16
Oscar Apfel
as Alfred Knuxton
Paul Stanton
as Daniel D. Harrington
Howard Hickman
as Major White
Lynn Bari
as Office Worker (uncredited)
Madge Bellamy
as Secretary (uncredited)
William Benedict
as Bunky, Office Boy (uncredited)
Sam Mintz
Writer
Charles Kenyon
Malcolm St. Clair
Director
Barney McGill
Director of Photography
