Steven Moffats second story of the RTD2 era is a banger, it may not be his best Christmas special let alone story but it sure is a hell of a good one to go out on, there are issues with this but Moffat nails 15s characterization , you can also tell that Ncuti is really in his stride here , like damn he’s good, he really feels like the doctor (not that he didn’t before) it really felt that Moffat was going for a mix of 7 and 12 here (more 7) and I really liked that, the use of a bootstrap paradox to show a year of the doctors life passing, joy becoming a star, one made of the hearts of life to bring joy and peace to earth, was absolutely beautiful, it’s a banging start for Season 2 of this era and with that fantastic trailer, I can only look forward for what’s more to come!