He was in the Christmas special and it looks like he's sticking around
There's a brand new companion
Her name is Bill and she looks awesome
They go all over the place. From the pyramids...
And plenty of alien planets...
There's a good helping of villains too! The Daleks make a return (of course).
So does Missy
And the Cybermen
(though they look a bit like they're in their pyjamas or something!)