A herpetologist investigating a series of fatal rattlesnake attacks discovers that the creatures have been infected by a mysterious nerve gas disposed of in the desert by the military.
| Actor | Role |
|---|---|
 Sam Chew Jr.Dr. Tom Parkinson | Dr. Tom Parkinson |
| EElisabeth ChauvetAnn Bradley | Ann Bradley |
| DDan PriestColonel Stroud | Colonel Stroud |
| RRonald GoldCaptain Delaney | Captain Delaney |
| AAl DunlapGeneral Hinch | General Hinch |
| DDan BalentinePilot Hawkins | Pilot Hawkins |
| GGary Van OrmandWoodley | Woodley |
 Darwin JostonPalmer | Palmer |
| TTony BallenSheriff Gates | Sheriff Gates |
 Celia MiliusWoman in Bathtub | Woman in Bathtub |
| SScott McCartorRick (as Scott McCarter) | Rick (as Scott McCarter) |
| EEric LawsonGuard | Guard |
| RRichard LockmillerDeputy | Deputy |
| CCary J. PittsSergeant | Sergeant |
| JJo JordanMother | Mother |
| TTipp McClurePlumber | Plumber |
| TTravis GoldTimmy | Timmy |
| AAlan DeckerDoug | Doug |
| BBob MerchonHoward | Howard |
| AAncel CookSam the Janitor | Sam the Janitor |
| MMatthew KnoxDave | Dave |
| JJohn LandonHines | Hines |