The story where the Doctor fights the Cybermen, saves the Earth, and then collapses on the TARDIS floor like someone who forgot their lines.
Short Synopsis
The TARDIS lands at a South Pole space tracking station in 1986, where the Cybermen make their chilling (and slightly cloth-faced) debut. They want Earth’s energy, humanity resists with shouting and rifles, and the Doctor has the audacity to suddenly change his face at the end.
Extended Storyline
The Doctor, Ben, and Polly land at the South Pole tracking station — a place apparently staffed entirely by men who sound like angry generals from a war film. They’re monitoring a spaceship when suddenly, another planet drifts into view: Mondas, Earth’s long-lost twin, because the solar system is apparently full of forgotten planets the Doctor never mentions until it’s plot-relevant.
Out of Mondas come the Cybermen — looking like someone raided a surgical supply closet, glued headlights to their heads, and called it a day. Their monotone voices and “we used to be human” backstory are genuinely chilling, even if the gauze masks make them look like they’re ready to rob a corner shop.
The Cybermen begin their invasion by sauntering into the tracking station and declaring that resistance is futile (before it was cool). Naturally, the humans resist anyway, mostly with yelling and a few pistols. The Cybermen start rounding people up while explaining their tragic history: they replaced all their body parts with machinery, deleted their emotions, and now think invading other planets is a fun hobby.
Meanwhile, Polly spends much of the story making tea, getting captured, and trying very hard to look supportive. Ben, on the other hand, gets to run around, punch things, and be generally heroic. The Doctor, though — well, he’s having a rough time. He keeps sitting down, looking pale, and muttering ominously about how his body is wearing thin, which is code for “we need to replace William Hartnell because he’s not well.”
Mondas, overloaded with stolen energy, starts to crumble like a badly-built Death Star. The Cybermen, now cut off from their power source, collapse in heaps, their invasion undone by their own bad planning. Humanity breathes a sigh of relief.
But the Doctor doesn’t join the victory party. Back in the TARDIS, he collapses on the floor as a stunned Ben and Polly watch. The console room fills with light, Hartnell’s face blurs, and — poof — suddenly there’s a new man lying where the Doctor was. Viewers in 1966 must have thought their televisions had broken, but no, it was history being made: the very first regeneration.