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)

D. Ross Lederman