The Doctor. In Order

Then: The Chronarchy and the Doctor’s Timeline: The Doctor’s Eighth Incarnation, up to the First Battle of Gallifrey   (say, a hundred and seventy-two years. In The Ancestor Cell , Romana has been President of the Time Lords for a hundred and fifty years. Respectfully disagreeing with Lance Parkin, who takes this as a hundred and fifty years from her accession in Happy Endings , I’m taking it as a hundred and fifty years from her taking over from Valyes in Ascension . In The Apocalypse Element , it is said that Romana was captured by the Daleks “weeks” after becoming President, but it must have been after Lungbarrow , so say a couple of years. She was succeeded by the unnamed President featured in The Sirens of Time and The Apocalypse Element , and returned after twenty years. Panacea , in which she leaves Gallifrey for the Axis, was released six years after The Apocalypse Element ; she returned in Ascension , say, a couple of years after that. In Happy Endings , the Doctor is about