Columbia Pictures elevated stunt man Jock O'Mahoney to stardom in this 15 chapter western serial about the building of the transcontinental railroad. O'Mahoney played a railroad agent who uncovers the master criminal behind a series of sabotage attempts on the construction site.

Jock Mahoney
as Jim Grant

Virginia Herrick
as Carol Lane

William Fawcett
as Rocky

Harold Landon
as Tom Lane

Jack Ingram
as Homer Lathrop

Mickey Simpson
as Cal - Henchman

George Eldredge
as Karl Ulrich- aka The Baron

Myron Healey
as Ace -Henchman [Chs.3,4,6,9,10,15]

Rusty Wescoatt
as Scully - Lathrop's Foreman

Frank Ellis
as Bat - Henchman