I absolutely adore the concepts of bio-mechanical spaceships and a mushroom infestation, they're such cool sci-fi ideas. The setting is eerie and unnerving which adds to the vibe that something isn't quite right on the planet. My only real complaint is how generic the 15th doctor comes across at certain points. Whilst Belinda is characterised reasonably well, the 15th doctor feels like he could be any of the doctors and the story wouldn't change at all.