The TARDIS takes the Doctor and Jo to a barren world in the far future where human colonists are scratching a living. But at night, the colonists are menaced by a monster.
| Name | Type | Role | |
|---|---|---|---|
| Malcolm Hulke | Writer | ||
| David Webb | Guest Star | ||
| John Line | Guest Star | ||
| John Baker | Guest Star | ||
| Michael E. Briant | Director |