The Doctor faces off against giant tentacles, fanatical swamp worshippers, and a refinery crew who think “health and safety” is just a funny phrase in the handbook.
Short Synopsis
The Doctor and Romana land on the swamp moon of Delta Magna, where a gigantic squid god named Kroll menaces both colonists and natives. In between avoiding sacrifices, tentacle attacks, and refinery explosions, they must retrieve the fifth Key to Time segment — which, naturally, is tangled up with the monster itself.
Extended Storyline
Our heroes arrive on what looks like the galaxy’s least desirable holiday destination: endless marshes, mosquitoes the size of birds, and a humidity index that makes Romana’s hairdo deeply regret its contract. The swamp dwellers — known as Swampies, because Doctor Who has never been subtle with names — are busy worshipping their god Kroll, an enormous squid that occasionally pops up to remind everyone who’s really in charge.
The Doctor and Romana soon discover that the local refinery crew and the Swampies are locked in an escalating feud. The colonists want to pump the swamps dry for profit, while the Swampies are more into sacrificing outsiders to appease their giant calamari deity. Both groups are equally unhelpful when it comes to polite conversation.
Naturally, Romana is captured by the Swampies and lined up for sacrifice — because it wouldn’t be Doctor Who if Romana didn’t spend at least one story per season tied to a ceremonial altar. The Doctor, in his usual fashion, alternates between cracking jokes and wriggling out of capture long enough to notice the key detail: Kroll isn’t just a monster, he’s literally infused with one of the Key to Time segments. Yes, the quest piece they’re looking for has merged with a squid the size of a skyscraper. Because of course it has.
Meanwhile, the refinery crew prove themselves only marginally less murderous than the Swampies. They regard the Doctor as a meddling trespasser, Romana as an inconvenience, and Kroll as a “minor ecological problem” despite the small matter of its tentacles wrapping around their pipelines. Their solution to everything is “blow it up,” which, to be fair, is a plan that at least has consistency.
Kroll finally rises in all its special-effects glory: a towering, tentacled beast that the production team swore up and down was terrifying, though it mostly resembled a wobbly sea creature from a particularly ambitious aquarium show. Still, within the story, it’s deadly enough — crushing machinery, sinking boats, and swallowing Swampies like popcorn.
The Doctor realizes the only way to save everyone is to extract the Key segment from within Kroll itself. Armed with nothing but a tracer and his unshakable confidence, he confronts the monster, zaps out the segment, and reduces the almighty squid god back into a regular old cephalopod. The Swampies lose their deity, the refinery workers lose their excuses, and Romana loses any lingering enthusiasm for swamp tourism.
With the fifth segment secured, the Doctor and Romana head back to the TARDIS, probably smelling like pond water and regretting every second of it.