A group of utility workers are trapped in a series of tunnels which, unfortunately, contain a scientist mutated by his own creation. The creature feeds instantly on a rat, becoming what it has eaten.
| Actor | Role |
|---|---|
 Tom SizemoreVince Stoker | Vince Stoker |
 Wendy AndersonKrendal | Krendal |
 Richard FitzpatrickCharles Deaver | Charles Deaver |
| AAmber CullSam | Sam |
 Martin RoachOtis | Otis |
 James BinkleyNathaniel Leech | Nathaniel Leech |
 Simon NorthwoodWilkes | Wilkes |
 Philip AkinSarge | Sarge |
 Tig FongTae Seng | Tae Seng |
 Joe DinicolCallum | Callum |
 Greg CampbellDoctor | Doctor |
| CChasing MercuryThemselves | Themselves |