Speed Devils (film)Speed Devils is a 1935 American film directed by Joseph Henabery, coproduced by Perfect Circle Piston Company and Warner Brothers, and released by Warner Brothers. The film is also known as Thru Traffic.CastPaul Kelly as Martin GrayMarguerite Churchill as Pat CoreyRussell Hardie as Dan HoldenLeo CurleyWalter FennerEarl Mitchell