There is a lot to unpack with the episode, which was jam packed with craziness and timely-wimey that only the Doctor can bring. First off, out of the gate, I loved Anita (Steph De Whalley) coming from the Time Hotel to save the Doctor. She was a great one-off character originally, and I also was delighted with the bits in this episode of old footage with her visiting other incarnations of the Doctor. Although her arrival was a way to a quick resolution to the conundrum that the Doctor (and the rest of the world for that matter) found himself in at the end of the previous episode, with him plummeting to the disintegrating Earth, it worked and left room for the rest of the action in an already extra-long episode. It also brings more examples in this season that have been throwbacks to earlier episodes in the current Doctor’s run as well as the classics.