First broadcast: on BBC Radio 4 ExtraLatest broadcast: on BBC Radio 4 Extra
The inhabitants of Purity Bay turn violent on the time travellers, and there's greater danger in store. Fifth Doctor adventure stars Peter Davison and Sarah Sutton.
First broadcast: on BBC Radio 4 ExtraLatest broadcast: on BBC Radio 4 Extra
The Time Lord, Tegan, Turlough and Nyssa run into a group of hygiene-obsessed settlers under attack. Fifth Doctor adventure stars Peter Davison and Janet Fielding.
First broadcast: on BBC Radio 4 ExtraLatest broadcast: on BBC Radio 4 Extra
Nyssa and Turlough uncover the secrets of the Takers, and the Time Lord walks into a trap. Fifth Doctor adventure stars Peter Davison and Mark Strickland.
First broadcast: on BBC Radio 4 ExtraLatest broadcast: on BBC Radio 4 Extra
The settlers confront their demons, but as the time travellers leave, one of them reveals a secret. Fifth Doctor adventure stars Peter Davison and Janet Fielding.