This would be an all timer finale perhaps even the best of the show? A shame it's bogged down by the hybrid prophecy/ general Gallifrey lore. It's hardly mentioned throughout the series and is framed in a massively confusing way. A threat to the time lords? But they're gone aren't they? Lost in time somewhere I thought? Oh no, wait - as of the last 5 minutes of last weeks episode they're back! There wasn't a big enough deal made out of it for that part of the episode to work. However, everything involving 12 and Clara is predictably incredible - genuinely one of the best doctor/companion chemistries in the show and eventually the payoff to the hybrid is a good enough answer for me. Clara's ending for me isn't as final as I'd like and isn't as hopefully bitter-sweet as any of the previous companion departures, just seems like Moffat really didn't have it in him to commit - he doesn't like endings.