As plague sweeps 17th century England, the Doctor discovers a more exotic threat at work - shipwrecked Terileptil convicts, intent on making the planet their own.
| Name | Type | Role | |
|---|---|---|---|
| Eric Saward | Writer | ||
| Peter Van Dissel | Guest Star | ||
| Eric Dodson (Headman) | Guest Star | ||
| James Charlton (Miller) | Guest Star | ||
| John Baker | Guest Star | ||
| Neil West (Poacher) | Guest Star | ||
| John Savident | Guest Star | ||
| Michael Robbins (Richard Mace) | Guest Star | ||
| Anthony Calf | Guest Star | ||
| Michael Melia (Terileptil) | Guest Star | ||
| Valerie Fyfer | Guest Star | ||
| Peter Moffatt | Director |