Doctor Who 9.01 The Magicians Apprentice

I'm all conferenced out; yesterday was the last day, and in the evening I had the chance to catch the Doctor Who season premiere on BBC America. Since my head still half crowded with academia and the transatlantic sense of being out of time hasn't abated yet (and won't have a chance to, since I'm flying back today), I'm feeling a bit groggy, so excuse any incoherence or inconclusiveness.

( Spoiler realise a Big Finish audio has just gotten jossed )