The heat of a meteor crashing into the lake incubates a prehistoric egg, which grows into a plesiosaur-like monster that terrifies the community.
| Actor | Role |
|---|---|
| RRichard CardellaSheriff Steve Hanson | Sheriff Steve Hanson |
| GGlen RobertsArnie Chabot | Arnie Chabot |
| MMark SiegelMitch Kowalski | Mitch Kowalski |
| BBob HymanRichard 'Doc' Calkins | Richard 'Doc' Calkins |
| RRichard GarrisonDan Turner | Dan Turner |
| KKacey CobbSusan Patterson | Susan Patterson |
| MMichael F. HooverRoss Conway | Ross Conway |
| SSuzanne LewisPaula Conway | Paula Conway |
| MMarc EliotJack Fuller | Jack Fuller |
| GGarry JohnstonBlackmailer | Blackmailer |
| SSonny ShepardRobber | Robber |
| JJohn CrowderMechanic | Mechanic |
| SSusy ClaycombWaitress | Waitress |
| HHal ScharnBirdwatcher | Birdwatcher |
| MMike SimmonsStore Clerk | Store Clerk |
| MMary WinfordLady Customer | Lady Customer |
| JJim GoeppingerVillager | Villager |
| JJoe SaswayFerguson | Ferguson |