Back up to: Doctor Who
4/4 The settlers confront their demons, but as the time travellers leave, one reveals a secret
3/4 Nyssa and Turlough uncover the secrets of the Takers, and the Time Lord walks into a trap.
2/4 The inhabitants of Purity Bay turn violent, and there's greater danger in store.
1/4 The Time Lord, Tegan, Turlough and Nyssa run into a group of hygiene-obsessed settlers.