The Caves of Androzani - Part Two
Chellak discovers that the Doctor and Peri he had executed were actually androids. The real Doctor and Peri find that they are now prisoners of Sharaz Jek. He explains that they will live with him indefinitely. Neither the Doctor nor Peri is excited by this proposition. Jek is very taken by Peri's beauty.
Jek is at war with Morgus, Chellak's boss. They were once partners but Morgus tried to kill him. Jek survived but is horribly scarred as a result of the attempt on his life. He wants Morgus' dead and until he gets what he wants he plans to keep the miners from reaching the reserves of Spectrox.
Salateen, the real Salateen, brings the Doctor and Peri some gruel. He tells them a bit more about Sharaz Jek. He explains that Jek will probably kill him now that he has Peri and the Doctor but his mood changes when the Doctor complains about cramps. Salateen asks them a couple questions and then explains that they must have been infected when they stepped in Spectrox nest.