A good start to season 9. The first appearance of the Daleks in 5 years/5 seasons. They don't do much until the last episode, but they're a constant overlord threat. The time travelling back and forth from the 20th to the 22nd century to prevent an oppressive future is cool, as those kind of stories usually are. I've usually said this is my favourite story from s9, let's see if it still is after my current rewatch.