Pluto, the distant future. The planet has been terraformed and is now orbited by artificial suns, provided by the rapacious company who ruthlessly exploit the relocated human workforce. The Doctor, Leela, and K9 arrive and befriend a luckless drone worker, but they must flee with him to the dark undercity...
| Name | Type | Role | |
|---|---|---|---|
| Robert Holmes | Writer | ||
| Carole Hopkin | Guest Star | ||
| Jonina Scott | Guest Star | ||
| Roy Macready | Guest Star | ||
| Michael Keating | Guest Star | ||
| William Simons | Guest Star | ||
| Adrienne Burgess | Guest Star | ||
| Richard Leech | Guest Star | ||
| Pennant Roberts | Director |