Ralph Bellamy
— Barry Eldon
Tala Birell
— Renee Dupont
Victor Kilian
— Tiny Davis
Douglass Dumbrille
— Victor Arnold
Robert Middlemass
— Drewen
Edward Van Sloan
— Schutter
Niles Welch
— "Marconi"
Robert Allen
— Bill Lewis
Billie Seward
— Mona Greenwood
Marianne Edwards
— Dorothy Dunlap
Geneva Mitchell
— Gertie Dunlap
Wyrley Birch
— Holden
Pat Flaherty
— Frank Dunlap
Wiley Post
— Himself
Charles C. Wilson
— Newspaper editor
Inez Courtney
— Second Nurse (uncredited)
Robert Stanley
— Pete's Pal (uncredited)
Ethel Bryant
Egon Brecher
— Schulter's Henchman
Al Hill
— Arnold's Chief Henchman