Billy Halop

Billy Barton

Huntz Hall

Gyp

Gabriel Dell

Terry

Bernard Punsly

Lug

Kenneth Howell

Harry Trent

Roger Daniel

Midge

Phillip Terry

Jim Bradford

Russell Hicks

Col. Barton

Cy Kendall

Brand

Ben Taggart

Severn

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)

Edward Fielding

Professor Farraday (uncredited)

George Eldredge

Draftsman Lynch (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)

Kenneth Harlan

Dyer, Factory Gate Guard (uncredited)

Lew Harvey

Woods - Farraday's Pilot (uncredited)

Ethan Laidlaw

Watchman (uncredited)

Tom London

Kearney - Riot Squad Cop (uncredited)

Pierce Lyden

Henchman (uncredited)

Eddie Parker

Truck Driver (uncredited)

David Sharpe

Henchman on Stairs (uncredited)

Ray Turner

Chauffeur (uncredited)