The Doctor constructed his own time machine, which his grand-daughter dubbed a “TARDIS.” They are unwillingly separated from their people and long to return to their homeworld due to being exiled.
Wait no, the Doctor’s people (known as Time Lords) are a godlike race of beings who all drive around in TARDISes. The Doctor stole a TARDIS and went gallivanting around the universe because he was bored with life on his homeworld. This was a grave crime, as Time Lords live by a strict code of non-interference.
EXCEPT when the Time Lords do wish to interfere in universal affairs, for which they have an agent – the Doctor – to do their bidding (even if he’s a reluctant agent.)
But then again…Time Lord society is a pompous, bloated bunch of self-satisfied buffoons who are completely out of touch with universal affairs. For that matter, the Doctor himself barely scraped through the Time Lord Academy, graduating in the bottom third of his class.
Wait, no! The Doctor is not just a Time Lord, far more than that! In fact, he’s one of the PREMIERE Time Lords…peer to Omega and Rassilon. He left Gallifrey in order to hide one of the Time Lord’s deadliest weapons – the Hand of Omega – and secreted it in the vicinity of Coal Hill School, circa 1963.
Which is weird, because…he’s half-human, on his mother’s side.
And then he’s the last of the Time Lords – the rest of his people and his homeworld were wiped out in a universal war with the Daleks.* He’s now a lonely God, known and feared throughout the universe for his might.
Well, not THAT lonely. The Master survived, and oh yeah…Gallifrey and all the Time Lords survived. They’re just stuck in a perpetual timeloop.
Oh did we say perpetual timeloop? We meant they were shunted off through a CVE to an E-space universe. Same difference though, they’re still lost forever, and the Doctor will never be able to communicate with them again.
Except through the Crack in Time.
And oh yeah…when he goes back and visits Gallifrey.