So we say Goodbye to the Raggedy Man, The Chin,and let's not forget the one who got to MARRY the girl WHILE the universe and TARDIS exploded around them, then had to leave because everyone thought he was dead and she had to break back INTO jail. Then there was Clara who was and wasn't, then came and went into the Doctor's past lives and his ship(his main squeeze) and even got to met his darkest secret.
With the town of Christmas in Peril, the Doctor is surrounded by enemies and the smile/crack in the wall was the Time Lords all along. The Doctor decides against his normal policy(Run, run fast) and stays for hundreds of years, growing old and wasting his last regeneration. After Clara and the TARDIS end up back at the Planet, which we find out is Trenzalore, Clara goes to the smiling crack in the wall and begs the Time Lords to grant the Doctor a new regeneration. The Smile goes away and Clara thinks all is lost, but then then regeneration starts and the power of it kills all the baddies. The Doctor and Clara go back to the TARDIS and she says wow you can keep your face. He says it's just starting and poof there's Peter Capaldi. Then he asks her how to fly the TARDIS.
I don't know what this means for next season. I'm sure he's losing the bowtie. I did like seeing Amy's both of them. River? That would have been nice. I think she should feature more in the new season. We know their time line is out of order anyway. I think Peter and Alex are a good match. I may write more on this later on the 5 or 6 viewing. LOL!