The Third Moon of Delta Magna, The Future. The Doctor and Romana arrive in search of the fifth segment and are immediately swept up in a conflict between the crew of a new refinery and the embittered natives…
| Name | Type | Role | |
|---|---|---|---|
| Robert Holmes | Writer | ||
| Carl Rigg | Guest Star | ||
| Grahame Mallard | Guest Star | ||
| Glyn Owen | Guest Star | ||
| Norman Stewart | Director |