Four flying G-Men protect America against enemy spies; one of the four assumes the identity of The Black Falcon, to befuddle the saboteurs even further.
Robert Paige
as Hal Andrews / The Black Falcon
Richard Fiske
as Bart Davis
James Craig
as John Cummings
Lorna Gray
as Babs McKay
Sammy McKim
as Billy McKay
Stanley Brown
as Charles Bronson
Don Beddoe
as W. S. Hamilton
Forbes Murray
as Marvin Brewster / The Professor
Lee Prather
as Simmons
Beatrice Blinn
as Brewster's Secretary
Ann Doran
as Hamilton's Secretary
Dick Curtis
as Korman
