Ken Williams is determined to discover the identity of the mysterious Rattler, who preys upon railroads and transportation companies like that owned by Jane Corwin. The Rattler is especially difficult to catch because of his skill at disguising himself as other people.
Unfortunately the movie Mystery Mountain is not yet available on HBO Max.
| Directing | Otto Brower | Director |
| Directing | B. Reeves Eason | Director |
| Writing | Bennett Cohen | Screenplay |
| Writing | Armand Schaefer | Screenplay |
| Editing | Earl Turner | Editor |
| Sound | Terry Kellum | Sound Engineer |
| Camera | Ernest Miller | Director of Photography |
| Camera | William Nobles | Director of Photography |
