Two couples vacationing together in an R.V. from Texas to Colorado are terrorized after they witness a murder during a Satanic ritual.
| Actor | Role |
|---|---|
 Peter FondaRoger | Roger |
 Warren OatesFrank | Frank |
 Loretta SwitAlice | Alice |
 Lara ParkerKelly | Kelly |
 R.G. ArmstrongSheriff Taylor | Sheriff Taylor |
| CClay TannerDelbert | Delbert |
| CCarol BlodgettEthel Henderson | Ethel Henderson |
| PPhil HooverMechanic | Mechanic |
| RRicci WareRicci Ware | Ricci Ware |
 Paul A. PartainCal Mathers | Cal Mathers |
 James N. HarrellGun Shop Owner | Gun Shop Owner |
| KKaren MillerKay | Kay |
| AArkey BlueArkey Blue | Arkey Blue |
 Jack StarrettGas Station Attendant | Gas Station Attendant |
| WWes BishopDeputy Dave | Deputy Dave |
| RR.C. KeeneSatanist (uncredited) | Satanist (uncredited) |
| JJoyce KingLibrarian (uncredited) | Librarian (uncredited) |
| PPaul MaslanskyRoad Worker in Cowboy Hat (uncredited) | Road Worker in Cowboy Hat (uncredited) |
 Dan Hewitt OwensJay (uncredited) | Jay (uncredited) |
| TTommy SplittgerberShop Foreman (uncredited) | Shop Foreman (uncredited) |