Well here is a first, a commentary that was originally so tedious that Toby decided to do it again. Doctor Who has an illustrious history of getting things wrong on the first attempt and trying again, so hopefully it's the right call. He hasn't cheated though, he goes back to his original recording when it comes to seeing if he and special guest Simon Guerrier like the same thing about this episode - which returns the Doctor to Skaro for the first time since his initial visit. And that's just the start of the action.