The Doctor and the MSC crew join forces with the Daleks to mine the parrinium, only to come under attack from the Exxilons.
| Name | Type | Role | |
|---|---|---|---|
| Terry Nation | Writer | ||
| Mostyn Evans | Guest Star | ||
| Joy Harrison | Guest Star | ||
| Neil Seiler | Guest Star | ||
| Julian Fox | Guest Star | ||
| Duncan Lamont | Guest Star | ||
| Arnold Yarrow | Guest Star | ||
| Michael E. Briant | Director |