A 5,000 year-old Pyramid stands at the centre of a war zone, where the Chinese, Russian and American armies are about to clash. There are many problems with that, but the one that intrigues the Doctor is this: there wasn’t a pyramid there yesterday.It's no secret that I haven't been a fan of the Steven Moffat era of Doctor Who (he's managed to turn a "must watch" show into a "I'll watch if there's nothing else on" show), and I've been particularly disinterested in Peter Capaldi's stint as the Twelfth Doctor (again, no criticism of the superb Capaldi, rather the awful storylines he's been saddled with), until the arrival of Bill this year.
The Doctor, Bill and Nardole face an alien invasion unlike any other, and before conquest can begin, these aliens need the consent of the human race…
That said, there have been some good episodes along the way: Last Christmas is actually my favourite of the Christmas-themed episodes that have become a fixture since the show returned, but last week's Extremis turned out to be - for me - the best episode of this current cycle by a long chalk.
If the show can maintain this level of experimental creativity and innovation - without becoming self-indulgent or stretching its ideas beyond its budget - then it looks as though the Twelfth Doctor will, at least, go out of a high.