Scotland, the near future. Something is smashing oil rigs off the Scottish coast, and UNIT have been called in to investigate. The Brigadier summons the Doctor to Earth to help in the investigation, but it soon becomes clear some kind of alien presence is at work...
| Name | Type | Role | |
|---|---|---|---|
| Robert Banks Stewart | Writer | ||
| John Friedlander | Writer | ||
| John Woodnutt | Guest Star | ||
| Bruce Wightman | Guest Star | ||
| Lillias Walker | Guest Star | ||
| Angus Lennie | Guest Star | ||
| Tony Sibbald | Guest Star | ||
| Hugh Martin | Guest Star | ||
| Douglas Camfield | Director |