Despite having seen this before I had no recollection of how good it was. You can tell it’s a Holmes script. You factions and brilliant allegories for colonialism, racism and imperialism.

The stark contrast between the film sequences in the swamps with the swampies and the interior sequences with the cruel colonialists keeps the direction fresh and engaging. Holmes is great at making both factions feel human - there are no caricatures here. And of course it teaches you all the right lessons.

Holmes’ skill is in keeping the swampies sympathetic despite them putting our heroes in consistent danger. Having The Doctor and Romana lumped in with a gun runner who had seriously betrayed the swampies is a wonderful way of making the whole thing murky and compelling.

They realised Kroll pretty well. It’s always hard trying to make a convincing giant monster but it came off pretty well to me - especially the giant tentacles.

It’s been a while since we’ve had a story of quite this quality and it is helping up the enjoyment of what has been a pretty solid series. I hope they keep it up.