The Governor forces the Doctor to tell him the true value of zeiton-7 but Sil attempts to derail his plans by subjecting Peri and Areta to an enforced mutation.
Quest roles:
Martin Jarvis(Butler), Stephen Yardley(Sevrin), Sheila Reid(Etta), Jason Connery(Jondar), Owen Teale(Maldak), Keith Skinner(Rondel), Forbes Collins(Chief Officer), Nabil Shaban(Sil)