The Menoptra attack the Carsinome and the Doctor and his friends come face-to-face with the Animus. The Isop-Top device is their only hope of destroying the alien creature.
| Name | Type | Role | |
|---|---|---|---|
| Bill Strutton | Writer | ||
| Ian Thompson | Guest Star | ||
| Catherine Fleming | Guest Star | ||
| Arne Gordon | Guest Star | ||
| Jocelyn Birdsall | Guest Star | ||
| Jolyon Booth | Guest Star | ||
| Richard Martin | Director |