He later retired but was called back into office after one of his successors, Lady President Romana went missing. He went to Archetryx as part of the Archetryx Convention, a conference on limiting time powers, before the Daleks through Etra Prime at it. He escaped and return to Gallifrey, just before a Monan Host deposition arrived seeking sanctuary. After the Celestial Intervention Agency's Coordinator Vansell persuaded him to let them land, he was tricked into allowing the Daleks on Gallifrey. Working with Romana and the Sixth Doctor to prevent Gallifrey falling to the Daleks, he was exterminated by them in the High Council chambers. (AUDIO: The Apocalypse Element)
The Presidents are categorised by in-universe chronological order. Loose chronological order applies for the lists, but when in doubt (as with the temporal uncertainty of the Time Wars), list them in the order in which they were first depicted as Presidents in the real world.