My love for the style, tone and production of this era gives my opinion of any story a little boost. My love for the lead actor is stronger than any since Tom Baker. Patrick, Tom and Sylvester are my Doctor Who heroes up to this point - they are what make the show essential viewing.

The robots and main architect villain are the primary elements holding this story back from its full potential. Given how imaginative the world building is elsewhere in the story, with the Kangs, residents and Pecks it would have been exciting if they’d managed to work out a villain that felt like it belonged in the same universe.

Some of the concepts work particularly well. The idea behind the towers themselves, an idyllic home which has been turned on its head, that the baddies work their way up, floor by floor killing anyone in their wake, is a very good one. The killer grannies are good value too. The monster hiding in the swimming pool is far less effective.

There never feels like there's quite enough plot to go round across the four episodes, I wonder if this should have been one of the three part stories in season 24. Or maybe they could have used the space in the story to build out Mel’s character a bit. Bonnie is doing a decent job with what she’s given but it’s a shame she’s never gotten a proper introduction.