When space fungus attacks, only Patrick Troughton’s mop of hair and a lot of bubble wrap can save the day.
Short Synopsis
The Ice Warriors return with a cunning plan: hijack the Earth’s T-Mat system (basically 1969’s dream of Amazon Prime delivery), replace express parcels with killer seeds, and terraform the planet into a Martian holiday home. The Doctor, Jamie, and Zoe try to stop them, armed only with science, foam-cleaning skills, and the ability to act very concerned while staring at white plastic balls.
Extended Storyline
By the far-off year of the late 21st century, humans have decided to stop bothering with cars, trains, or planes. Instead, they rely entirely on T-Mat, a teleportation system that can send people, cargo, or probably pizza anywhere on Earth instantly. (Yes, humanity’s entire existence depends on one technology. No, there’s no backup plan. Don’t think about it too hard.)
Enter the Ice Warriors, last seen stomping around in The Ice Warriors. This time, they hijack the T-Mat relay station on the Moon. Their cunning plan? Instead of teleporting food and medicine to Earth, they’ll teleport seeds—special Martian seeds that turn into fungus foam clouds, reducing oxygen and making the planet uninhabitable for humans but just dandy for Martians. You’d think they’d just bring a flamethrower or a massive freezer, but no—this is Doctor Who. Fungus it is.
When Earth authorities realize that their Amazon packages now contain death spores instead of socks, they send the Doctor, Jamie, and Zoe to investigate. The Doctor, delighted at the prospect of another crisis, discovers the fungal foam has a tendency to spread faster than a dodgy curry at a student hall. Soon London is being consumed by mountains of sudsy bubbles that look suspiciously like the BBC raided the props cupboard from Blue Peter.
Meanwhile, the Ice Warriors, stomping around with their hissing voices and bulky armor, try to speed up the terraforming process. Zoe does her usual thing of being the smartest person in the room, while Jamie waves his sword at people who couldn’t care less.
The Doctor finally figures out that the foam can be destroyed with good old-fashioned water—making this perhaps the least threatening alien invasion plan in history. He also commandeers a rocket (because of course he does) to return to the Moon, where he thwarts the Warriors and their leader, Slaar. With some explosive improvisation and his usual twinkle-eyed brilliance, the Doctor saves Earth, proving once again that you don’t need to be taller than 5’6” to outwit an intergalactic empire.
The Ice Warriors slink away, Earth goes back to having Amazon Prime, and humanity decides maybe—just maybe—putting all their eggs in one teleporting basket wasn’t the greatest idea. (Spoiler: they keep doing it anyway.)