I am being slightly overly harsh with my rating as there is one very, very specific section of this episode that I can't help but hate conceptually so much so that it almost entirely overshadows and drags the story down. Perhaps I'm allergic to fun, I don't know, but the reveal of the Rani made me audibly wince. It is astounding how the show treats such an event so backhandedly- there is no reason it couldn't have been tacked onto the next episode. There's a giant amount of breathing room that's needed for me to accept it, one that simply wasn't provided by the episode itself. Bi-generation being treated as suitably fantastical for the Fourteenth/Fifteenth Doctor, said to be a myth, essentially rewarded to the Doctor as a result of battling the Toymaker- is now casually being thrown at the Rani, of all people? Thank you for dismantling the concept into something almost mundane, I guess. I'm hoping the next episode does something to justify it, but it currently leaves a bitter taste in my mouth for the episode as a whole.