"A female agent tacks down the cause of mysterious explosions."
Karen Morley
as Linda Beech
Robert Baldwin
as Derrick Holt
Eduardo Ciannelli
as Franz Jorg
Katharine Alexander
as Helen Lavering
Claude King
as Eric Ledyard
Agnes Anderson
as Mary Smith
Milly
as Milli Monti
Jon Hall
as Bertie
Ted Adams
as Montritz Hotel Valet
Leonid Kinskey
as Mischa
Dennis O'Keefe
as John
Odette Myrtil
as Yvonne Dupre
Don Brodie
as Joe
Gino Corrado
as Violinist / Translator
Fred Farrell
as Porter
Alphonse Martell
as Valet #2
Philip Sleeman
as Valet #1
Doris Anderson
Writer
Coningsby William Dawson
Story
Robert G. Vignola
Director
Dore Schary
George McGuire
Editor
Emanuel Cohen
Producer
Robert Pittack
Director of Photography
Leo Shuken
Original Music Composer
John Burke
