I was wowed by just how detailed the plot is and the amount of effort put into building out the characters. I do feel modern day UNIT stories could learn a thing or two from The Zygon Invasion, Kate Stewart’s finest hour as she gets stuck into the action in New Mexico, lost in the moment of her new mission. And Osgood makes up the second half of the perfect double act. Nerdy, courageous, relatable.

There are thought provoking themes in this story about terrorism and forces trying to disrupt multiculturalism, giving The Doctor the perfect set up to talk about the sort of world he passionately believes in.

The Zygon’s now being able to take on the form of loved ones is an exciting new detail, even if it does lead to the only clunky scene in the whole story of gormless soldiers marching to their death.

Peter Capaldi is on excellent form - he is in funny mood trying to be cool. Potentially the most Doctor-ish mode we’ve seen him in up to this point. Jenna Coleman gets the meaty task of playing two characters, one of whom is evil - and she is living up to the task beautifully. I wish I hadn’t seen the story before so her turn could go unnoticed! Brilliant drama.