While Ian and Vicki are threatened by a Mire Beast, the Doctor and Barbara meet up with the Aridians...who are then ordered to hand them over to the Daleks.
| Name | Type | Role | |
|---|---|---|---|
| Terry Nation | Writer | ||
| Hywel Bennett | Guest Star | ||
| Al Raymond | Guest Star | ||
| Ian Thompson | Guest Star | ||
| Richard Martin | Director |