William Gargan
— Perry Travis
Marguerite Churchill
— Lois Allen
Gene Morgan
— Brainy
John Gallaudet
— Billy Howard (Uncredited)
Romaine Callender
— E.J. Easton
Egon Brecher
— Sir Conrad Stava
Drue Leyton
— Mrs. Foster
Wade Boteler
— Conroy
Dwight Frye
— McBride
Raymond Lawrence
— Harkness
Stanley Andrews
— Earl Quillan (Uncredited)
Don Brodie
— Taxi Driver (Uncredited)
Frank Bull
— Radio Announcer (Uncredited)
Ralph Byrd
— Cop (Uncredited)
Harry Depp
— Julius Scott (Uncredited)
Robert Fiske
— Aviator (Uncredited)
Harry Harvey
— Bennett (Uncredited)
Jack Hatfield
— Reporter (Uncredited)
Eddie Kane
— Venuti (Uncredited)
Edward McWade
— Walter Emerson (Uncredited)
Ted Oliver
— Cop (Uncredited)
Edward Peil Sr.
— Peters (Uncredited)
Lee Prather
— Customs Officer (Uncredited)
Francis Sayles
— Waiter (Uncredited)
Albert J. Smith
— Mike (Uncredited)
George Webb
— Coroner (Uncredited)
Norman Willis
— Joel Balerino (Uncredited)
William Worthington
— John J. Foster (Uncredited)