Danger Lights

Louis Wolheim

Dan Thorn

Robert Armstrong

Larry Doyle

Jean Arthur

Mary Ryan

Hugh Herbert

Professor

Frank Sheridan

Ed Ryan

Robert Edeson

Tom Johnson

Alan Roscoe

Jim

William P. Burt

Chief Dispatcher

Jim Farley

Joe Geraghty

James Donlan

Picnic Barker (uncredited)

Frank Mills

Hobo (uncredited)

Lee Phelps

Railroad Worker (uncredited)