Alan Holt is a radio expert who has invented a death ray machine for the U.S. government. International spy Drakma wants to get his hands on the invention and he sends his henchmen to attack Holt in his laboratory.
Agnes Ayres
Mary Walsworth
Antonio Moreno
Alan Holt
Tyrone Power Sr.
Drakma (as Tyrone Power)
Louis Wolheim
Kurder
Dagmar Godowsky
Claire
Jack Lionel Bohn
Don Powell
Maurice Costello
The Cripple
Frank Currier
Adm. Walsworth
Ivan Linow
Lab assistant
Arthur Stringer
Novel
Irvin Willat
Director
Victor Irvin
Writer
