A brand new Doctor Who debuted on New Zealand screens last night, and for the first time in the show's history, it was a woman.
The five-minute video, which was the end of the series' Christmas special, features outgoing star Peter Capaldi regenerating into Whittaker, who will become the 13th time lord in the franchise's more than 50-year history.
But how will Whittaker be introduced to the world as the Thirteenth Doctor? So it's not too surprising, then, that this year's special would be an emotional event for Who fans and its showrunner alike.
The good news is that it's very easy to watch Doctor Who in the UK.
To pull this off, Moffat positions Capaldi's Doctor and David Bradley's First Doctor in the South Pole, where, not coincidentally, they're both attempting to stave off regeneration.
The first sight of Whittaker in the sci-fi show excited fans on social media, with fans hailing her "stunning" entrance whilst also bidding farewell to Capaldi...
In its first twenty-six years, only one episode of Doctor Who fell on Christmas Day.
"Twice Upon a Time" delivers a fairly potent story about memory and nostalgia, one that understands the emotional attachment there is to the Doctor in all of its incarnations and how hard it can be to let go of any one of them.
She's only got one line in the Christmas episode, which was titled Twice Upon a Time, but the appearance certainly made an impact.
As time goes by, appreciation for Capaldi's Twelfth Doctor will grow, which these truly outstanding performances will prove why.