A high-speed train becomes the star of the film as it rushes from Chicago to Hoover Dam to transport an iron lung to a needy patient.
Sally Blane
as Ruth Dexter
Charles Starrett
as Tom Caldwell
Hardie Albright
as Allan Dexter
William Farnum
as B.J. Dexter
Irving Pichel
as Bronte
Arthur Lake
as Crawford
Theodore von Eltz
as Tyler
Guinn "Big Boy" Williams
as Higgins
Edgar Kennedy
as O'Brien
Doris Dawson
as Molly
Ray Turner
as Sam
Murray Kinnell
as Dr. Flynn
