Ken Williams (Ken Maynard) is determined to discover the identity of a mysterious killer who preys upon railroads and transportation companies like the ones owned by Jane Corwin (Verna Hillie). Her railroad worker father (Lafe McKee) was the first victim of the murderous fiend known as the Rattler, who is especially difficult to catch because he makes himself appear as other people with a collection of masks, or he effects a strange disguise with eyeglasses, a fake nose, and a crepe-hair mustache. The Rattler — also known as "the Menace of the Mountain" — attempts to control the mountain and its hidden gold from his secret cave filled with strange electronic gadgets.[3]
Gene Autry as Thomas, Lake Teamster (chapters 6,7,8,12) (uncredited)[1][4]
Production
Filming and budget
Mystery Mountain was filmed in the fall of 1934. The film had an operating budget of $65,000 (equal to $1,480,448 today), and a negative cost of $80,000.[1]
Filming locations
Bronson Canyon, Griffith Park, Los Angeles, California, USA
According to the book The Great Movie Serials: Their Sound and Fury, Ken Maynard was doubled by Cliff Lyons in some scenes but performed many of his own stunts, especially riding, in others.[6] However, the later book In the Nick of Time states that Ken Maynard was doubled by his brother Kermit Maynard. The physical similarities between the two makes it difficult to spot the difference on screen between actor and stuntman.[7] Maynard's horse, Tarzan, had three doubles, one of which was blind.[6]
Future serial director William Witney, working as an assistant director, performed one stunt during this serial when the stuntman failed to show up to the location shoot. He rode a horse at speed across a bridge over a ravine with a moving train behind him.[8]
Special effects
Special effects were provided by J. Laurence Wickland.