 Toward the end of episode 3 he is seen, apparently, fighting off the effects of an impending regeneration so he can return to Androzani Minor to save his companion Peri.<ref></ref>

Time Lords appear to have the ability to stay conscious for moments after events that would outright kill other lifeforms instantly, giving them the opportunity to regenerate.In "Logopolis", the Fourth Doctor falls hundreds of feet to the ground, yet is still conscious and able to talk to his companions when they find him minutes later before he regenerates.In "The Caves of Androzani",<ref></ref> the Fifth Doctor remains conscious throughout the entire course of his (eventually fatal) spectrox toxaemia, while his human companion Peri loses consciousness as the disease worsens.