Immense scale with masterful (HAHAHAHAHA) performances all the way through, a really interesting way to wrap up RTD's vision of the time war and version of how the characters involved handled it. The story-line does feel somewhat overcrowded despite the small cast, it sort of gets in its own way, constantly raising the stakes to beyond where they should be at an almost nauseating pace. The ending however, is thankfully brilliant. The return of Gallifrey, 10 and Wilf's duologue, The Master's switch and the impeccable realisation of the four knocks prophecy.

Most of the Doctor's present their 'alien-ness' in varying ways, Tennant's most consistent showcase of his otherness was his superiority and power in whatever situation he found himself in. This version of the Doctor was heavily mythologised (as seen in the first part of his finale and 'The Fires of Pompeii') to the point he was represented as more of a Time God than a Lord. The Doctor himself realised this. Perhaps more than other incarnations, this incarnation grappled with loss and loneliness - whenever he found someone to drown out his survivor's guilt, he lost them not too long after. As I say, this Doctor is repeatedly hailed as a hero, and a winner by those he saves - and even by himself at his darkest. At the point we find him in The End of Time, these titles are practically the only thing left he has in his life.

All of this to say, the resolution of the four knocks is beautifully poetic. The 10th Doctor, the hero, the winner chooses to lose. When all is said and done, The Doctor saves people, not for the glory but because he knows it's the right thing to do. This moment is one of the heights of the series, lifted there by some of the best performances ever put to screen and supported by THE Murray Gold, who actually might be a god.

The episode probably should end here, but the slightly self indulgent rehash of Journey's end is nice enough. Of course 10 wouldn't want to be alone at the end, what's to come for him is already scary enough.

When Tennant eventually regenerates, it's devastating and bleak. His final plea to stay has traumatised generations of fans. One of the most beloved Doctors of all time, and maybe its out of fashion to say it these days, but rightfully so.