Doctor Who has never been shy about showing its roots, from Dracula and Frankenstein to Forbidden Planet. I honestly thought the Xmas episode was going to be far worse than it was, despite the nice performances from most of the cast. The little part of me that died when Santa showed up at the end of Death In Heaven (no, not that part of me) was partially revived by this one. I was glad my hopeful predictions about who and what he really was were mostly accurate; but then, it couldn't have been signposted much more blatantly, could it?
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'