When sorting out her mother's estate, Sarah uncovers evidence that the real cause of her sister's death was an attack by a mutant, brain-eating jellyfish that had infiltrated the water supply.
| Actor | Role |
|---|---|
 Genevieve MooySarah | Sarah |
| MMaureen SherlockEllie | Ellie |
| DDale “Bear” JacksonTom | Tom |
| PPatrick FrostClive Ziebelt | Clive Ziebelt |
| AArwed TuronSimon Backhouse | Simon Backhouse |
| DDon BarkerGerald | Gerald |
| SScott PerryGavin | Gavin |
| WWayne AnthonyGeoff | Geoff |
| KKathy FisherCath | Cath |
| CCarole YellandJoy | Joy |
| TTess O’FlahertyTess | Tess |
| LLachlan StewartJarrad | Jarrad |
| BBarbara Westthe voice of Monica | the voice of Monica |
 Meme ThorneDoctor Goldsmith | Doctor Goldsmith |