Liz has been captured by Reegan who is holding the three aliens captive. The Doctor suspects Quinlan's part in the conspiracy, but Quinlan is killed before he can reveal the truth.
| Name | Type | Role | |
|---|---|---|---|
| David Whitaker | Writer | ||
| Malcolm Hulke | Writer | ||
| Robert Cawdron | Guest Star | ||
| Michael Ferguson | Director |