Dr. Who (Earth-33⅓)

Dr. Who, also called the Movie Doctor, (COMIC: Doctor Who? 95) was the Earth-33⅓ counterpart of the Dr. Who of a separate reality. Susan was seemingly his great-grandmother, (COMIC: Doctor Who? 106) and he found himself as an enemy of the First Doctor. (COMIC: Doctor Who? 95)

According to one account, he and Susan discovered that they only fictional characters within the works of the Scriptwriter. (PROSE: Doctor Who 3 - The Third Motion Picture)

On Gallifrey
Dr. Who attended the Annual Gallifreyan Doctor Who Con in the company of the Doctor's first six incarnations, the First Doctor, the Second Doctor, the Third Doctor, the Fourth Doctor, the Fifth Doctor and the Sixth Doctor. The seven Doctors were asked by a fan about their worst enemy; the First Doctor angrily named "the Movie Doctor" as his, while a distraught Dr. Who replied that it was Roberta Tovey, (COMIC: Doctor Who? 95) an evil later defeated by the Sixth Doctor. (COMIC: The Final Script)

The end?
According to one account, Susan and Dr. Who eventually realised that they were only fictional characters within the works of the Scriptwriter. Partway through the script of what would have been a third movie with the characters, in which Dr. Who had greatly aged and was now nearly senile (though still inventive and self-reliant, notably creating himself a turbo-charged walking frame), Susan decided that she had had enough of the Scriptwriter putting them through one ridiculous situation after another — especially as, being a child actor, Susan would only get the pay on her 21st birthday. Pulling out a hammer and a wooden stake, props saved from her Grandfather's last acting job, Susan somehow reached beyond her fictionality and staked the Scriptwriter through the heart, putting an end to the Dr. Who movies once and for all. Upon reading through the unfinished script, Peter Cushing tried to "burn, drown and throttle it" but was unable to destroy it, merely losing it; it was later found and the truth discovered. (PROSE: Doctor Who 3 - The Third Motion Picture)

Discovering the truth of his lineage
Overhearing a conversation between Susan Foreman and the First Doctor in which they revealed that Susan was actually the Doctor's grandmother because Time Lords get younger with each regeneration, Dr. Who finally realised the truth of his own lineage and that his Susan, the girl he had raised as his granddaughter, was in fact his great-grandmother. (COMIC: Doctor Who? 106)