The Doctor escapes from the spiders' larder only to encounter the Great One, while Sarah makes a deal with the Queen Spider.
| Name | Type | Role | |
|---|---|---|---|
| Barry Letts, Robert Sloman | Writer | ||
| Maureen Morris | Guest Star | ||
| Jenny Laird | Guest Star | ||
| Gareth Hunt | Guest Star | ||
| Joanna Munro | Guest Star | ||
| Ralph Arliss | Guest Star | ||
| Kismet Delgado | Guest Star | ||
| Geoffrey Morris | Guest Star | ||
| Barry Letts | Director |