Two investigative reporters track down reports of giant rats in a city sewer system.
| Actor | Role |
|---|---|
 Catherine BachPam Weiss | Pam Weiss |
 Charlene DallasSharon Fields | Sharon Fields |
 Nicholas GuestRon Bellard | Ron Bellard |
 John SaxonHerb Tamplin | Herb Tamplin |
 Vic TaybackThe Exterminator (Greengrass) | The Exterminator (Greengrass) |
 Cork HubbertSlater | Slater |
 Victor BrandtLance Bellard | Lance Bellard |
 Luis ÁvalosCoroner | Coroner |
| RRay TillotsonWayne Sherman | Wayne Sherman |
 Rick ZumwaltTiny | Tiny |
| BBarbara LuschVal | Val |
| JJeanie MooreHungry Hooker | Hungry Hooker |
| SSyd BeardApple Bob | Apple Bob |
| SScott McKayRatman | Ratman |
| MMichael J. ScherlisPolice Officer | Police Officer |
 Sonia JacksonPolice Officer | Police Officer |
| HH. Mark VuillePolice Officer | Police Officer |
| DDavid ChungSailor | Sailor |
| PPhyllis DelioWomen's Room Screamer | Women's Room Screamer |
| JJeff SmolekKarate Instructor | Karate Instructor |
| RRita HerringKarate Student | Karate Student |
 Michael JoinerDetective Jones | Detective Jones |