It was OK, the first 20 minutes could have been dispensed with, and as always with Moffat you’re left with the feeling that the same story could have been told much more simply without the noise and clutter: what was the point of snake-dude other than to do Sith impressions? And the tank and guitar stuff? Sorry, that’s bad fan-fiction.
The idea that an older and bitterer Doctor than the one in Genesis of the Daleks
abandoned Young Davros and thus contributed to his fear and hatred, which resulted in the creation of the Daleks
was an interesting one, but falls apart under any examination: what was the Doctor doing on Skaro then anyway, that he should just happen across the one person whose destiny he could so critically shape? Did he not know where he was? And when Davros first met the Fourth Doctor, why did he not recognise him as the Tardis piloting sonic screwdriver tossing Time Lord who had failed to save him? The guy’s a genius, surely he should have twigged as soon as he learnt that the guy who he’d captured was a Time Lord.
And with the Daleks from various eras hanging out and partying, it seems the NuDaleks have been erased from the time stream. Nice to see the Special Weapons Dalek was invited, though.
On the plus side, I like the chemistry between Missy and the Doctor; it’s a real call-back to the Jon Pertwee/Roger Delgado dynamic.