Doctor Who: The Capaldi Years - Christmas Special 2017

My favourite Christmas Special, it was sooo good! Despite I'd prefer if the Twelfth Doctor regenerated in The Doctor Falls, this story was enjoyable and didn't ruin the previous series finale. Delighted to see the First Doctor and Bill again, I was sad of course for the regeneration scene, since the Twelfth Doctor became my favourite NuWho Doctor by then.