When are we going to address the elephant in the room that is the 11th Doctor's time spent on Trenzalore and his regeneration into 12? He was happy travelling around as normal, except now post-Day of the Doctor, he has the hope that Gallifrey's now out there somewhere. Then one day he meets up with Clara and suddenly the planet all those spaceships are hovering around turns out to be the one he's been avoiding. Literally the hill he was told he would die on. And he has to go there anyway, no putting it off anymore. And at this point he still thinks he's on his last life, even though we as an audience didn't know for sure until the moment he told Clara that (even if some of us worked it out with maths). So we have an Eleventh Doctor who is really the Thirteenth, who has cheated death before on Lake Silencio, (which suddenly makes more sense now, the way he went into it assuming he couldn't get out no matter what he did, for most of Series 6) (ignore the simulated regeneration energy, that was just the Teselecta robot doing it for show and probably to deflect from the notion that this Doctor is on his last pair of legs). And how long does he have to stay there on Trenzalore as it's sherrif? 300 years, then several hundred more. It's not stated explicitly in the story but it's assumed to be around 900 years, and that's how Matt Smith's Doctor gets so old, wrinkly and forgetful of everyone and everything to the point that he still says Barnable's name by force of habit. Or maybe dementia. Then he goes up the bell tower to make his final stand, and is saved by the crack opening up and sending him regeneration energy. So now he can regenerate infinite times, something that was always hinted at as being possible in Big Finish audios and such but never confirmed. It officially confirms that the regeneration limit WAS a conspiracy by Rassilon to keep everyone else in check. The Doctor regenerates in the weirdest way as well. He basically explodes everything around him like a nuke, and then rushes off to the TARDIS looking as young as he did at the beginning of the story, gets changed into his regular Series 7B outfit and calls Clara from Glasgow in their future/Earth in the 21st century (which is probably the past at this point). And does his whole speech about "Not forgetting one line of this, I swear. Not one day. I will always remember when the Doctor was me." And THEN after an abrupt sneeze of a regeneration into Peter Capaldi (who for some reason has no idea how to pilot the TARDIS, I dunno maybe all those long years on Trenzalore made him forget or something...) they fly off and end up in the mouth of a T-Rex and drag said T-Rex into Victorian London. And for the ENTIRETY of Series 8, 9 and 10, the Doctor's time on Trenzalore is literally NEVER addressed or mentioned again. 900 years stuck on a single planet, fighting a long protracted war against Daleks, Cybermen, Sontarans and who knows what else, and Peter Capaldi's Doctor never brings it up. I get the feeling that his second episode, Into The Dalek, is him going around cleaning up the mess left in the wake of Trenzalore. But that's just personal headcanon. We never hear that planet's name ever again. It's just left by the wayside as if it never happened, when it could have been a goldmine of personal trauma and psychological issues for Twelve to address, just like the Time War. I'm sorry, but this has been on my mind since 2013 and I can't let it go. Whenever the Doctor spends an EXTREMELY long time in one place it kind of gets under my skin somehow. Not as much as Heaven Sent, but it's close.
@dw-opinions-you-wont-like very interested to hear your take on this.
