Billy Halop
— Billy Barton
Huntz Hall
— Gyp
Gabriel Dell
— Terry
Bernard Punsly
— Lug
Ken Lundy
— Buck
Kenneth Howell
— Harry Trent
Roger Daniel
— Midge
Phillip Terry
— Jim Bradford
Russell Hicks
— Col. Barton
Cy Kendall
— Brand
Ben Taggart
— Severn
Victor Zimmerman
— Henchman Corey
Edgar Edwards
— Henchman Evans
Gene Rizzi
— Henchman Foster
Florence Halop
— Mary
Donald Curtis
— Henchman Akin (uncredited)
Al Hill
— Henchman Burke (uncredited)
Ralph Peters
— Henchman Greeley (uncredited)
Harris Berger
— Sailor (uncredited)
Hal E. Chester
— Murph (uncredited)
Edward Fielding
— Professor Farraday (uncredited)
George Eldredge
— Draftsman Lynch (uncredited)
Bill Cartledge
— Junior G-Man (uncredited)
Julie Duncan
— Crawford's Secretary (uncredited)
Jean Brooks
— Waitress (uncredited)
Lane Chandler
— Second Cop at Building Collapse (uncredited)
Jack Cheatham
— First Cop at Building Collapse (uncredited)
William Desmond
— Irish Cop (uncredited)
Jim Farley
— Accusing Pedestrian (uncredited)
William Hall
— FBI Agent Watson (uncredited)