Synopsis by Hans J. Wollstein
Veteran serial star William Desmond takes the well-travelled Zorro route in this fine chapterplay released by Universal in 10 installments. Desmond plays Jim Davis, a secret service agent by day and masked avenger by night. Ethlyne Clair provided feminine appeal, while Bud Osborne, as the notorious Butch Bradley, and a young Boris Karloff took care of the villainy. The Vanishing Rider was co-written by genre specialists George H. Plympton and Val Cleveland (aka Karl Krusada).