Sarah is captured by the spiders' guards while the Doctor tries to help Arak and the others strike back against the spiders.
| Name | Type | Role | |
|---|---|---|---|
| Robert Sloman, Barry Letts | Writer | ||
| Geoffrey Morris | Guest Star | ||
| Jenny Laird | Guest Star | ||
| Kismet Delgado | Guest Star | ||
| Joanna Munro | Guest Star | ||
| Maureen Morris | Guest Star | ||
| Ralph Arliss | Guest Star | ||
| Gareth Hunt | Guest Star | ||
| Barry Letts | Director |