The dead planet is not uninhabited after all. The Doctor is about to meet what will become his greatest enemies. And he and his crew are dying of radiation sickness.
| Name | Type | Role | |
|---|---|---|---|
| Terry Nation | Writer | ||
| Peter Hawkins | Guest Star | ||
| David Graham | Guest Star | ||
| Robert Jewell | Guest Star | ||
| Gerald Taylor | Guest Star | ||
| Kevin Manser | Guest Star | ||
| Michael Summerton | Guest Star | ||
| Christopher Barry | Director |