Very very spoilers.
And before that, a deleted scene from early on.
So the TARDIS exploding was Kovarian’s fault, the Papal Mainframe became the Silence for an absolute good cause, the Daleks should really learn not to nano-convert people with a high Willpower score and the Crack leads (at least sometimes) to Gallifrey, and they can bend their own rules.
Clear enough, really...
Dalek Zombie Silents!
Nice Cyberman leftovers!
Trenzalore now ranking just behind Earth in the favourite planet stakes!
The Children In Need bit about holographic clothes may now be canon!
Special Guest Weeping Angels!
Utterly gratuitous wig joke!
Kidneys! As spoken with quite the Scots accent! How very Scottish to take umbrage at one of your internal organs!