The Doctor takes Clara and some children to a derelict theme park in space. Cybermen show up, upgrade themselves into unstoppable techno-nightmares, and the Doctor winds up playing a deadly chess match against his own brain.

Extended Storyline

We start off innocently enough: the Doctor has promised Clara a nice day trip. Naturally, this involves dragging along Angie and Artie, the two kids she’s been nannying. Because nothing says “day out” like a dilapidated alien theme park on a remote space station. The kids’ reaction? Maximum sulk. (Honestly, they’d probably complain if he took them to Disneyland.)

The funfair isn’t quite as abandoned as it looks. Its caretaker, Webley (a delightful Warwick Davis), shows off curiosities from a bygone age, including a “Cyberman chess player” — basically Deep Blue, but with more exoskeleton. Surprise! The “chess player” isn’t quite as deactivated as advertised. Enter the Cybermites, creepy little metal bugs that scuttle about like the world’s least cuddly silverfish.

One bite later, and the Cybermen are back, shinier, faster, and suddenly rocking new abilities like detachable heads, superspeed, and the ominous power to say “UPGRADE” like it’s a sales pitch. They promptly infect the Doctor himself, spawning his new alter ego: Mr. Clever. Cue Matt Smith acting opposite himself, switching from manic Time Lord to icy Cyber-possessed villain with nothing more than a twitch of the mouth and a dead-eyed stare. It’s both brilliant and unsettling — the man basically plays chess against his own face.

Meanwhile, Clara gets saddled with a platoon of punishment soldiers who were banished to guard duty because they were basically rubbish. In true Clara fashion, she takes command without hesitation, barking orders, devising defenses, and managing to look more authoritative than the lot of them combined. (Honestly, she should’ve put “temporary general” on her CV.)

Back in the Doctor’s brain, the duel is literal: a chess match where the stakes are his mind, the TARDIS, and the universe. Mr. Clever taunts him, offering bargains and occasionally leering creepily at Clara through the Doctor’s mouth — a detail as unsettling as it sounds. The Doctor, of course, outsmarts him in the end with a classic paradox: forcing a situation where every possible move leads to checkmate. It’s Time Lord Brain 1, Cyber Upgrade 0.

The climax sees Porridge — the quiet little man tagging along — revealed as none other than the Emperor of the Known Universe, hiding from his responsibilities by working as a fairground custodian. (You know, as you do.) He reluctantly orders the destruction of the entire planet to stop the Cybermen, a move both tragic and very “big red button.” Luckily, he offers Clara a chance to be Empress afterward. She declines, which is frankly rude because “Empress Oswald” has a nice ring to it.

The Doctor, Clara, and the kids hop back to Earth, everyone safe — though Angie and Artie are still unimpressed. Honestly, if saving them from Cybermen doesn’t win them over, nothing will.

The Doctor and Clara stumble into a Victorian wellness cult where “healing” means being dipped in alien goo until you look like overcooked bacon. Luckily, Madame Vastra, Jenny, and Strax are on the case.

Extended Storyline

We open with that most Victorian of activities: a melodramatic funeral scene. A corpse has been discovered — stiff, grotesque, and blood-red. Locals whisper of “the Crimson Horror,” a mysterious plague tied to a creepy utopian community known as Sweetville, run by Mrs. Winifred Gillyflower and her disturbingly Stepford daughter, Ada.

Enter our favorite Victorian investigators: Madame Vastra (lizard detective extraordinaire), Jenny (her wife/sidekick/actual muscle), and Strax (the potato with a gun). They’re on the case, snooping about Yorkshire and trying to discover what’s rotting the local population from the inside out. Honestly, for the first 15 minutes, this feels more like The Vastra Adventures than Doctor Who, and it’s glorious.

Jenny infiltrates Sweetville undercover, looking every inch the Victorian governess gone rogue. Inside, she finds workers living in eerily perfect conditions — too perfect. Everyone’s a little too smiley, a little too Stepford. It’s like Willy Wonka’s Chocolate Factory, except with less chocolate and more sinister sermons.

Then comes the shocker: locked in a cell, red as a boiled lobster, is the Doctor himself. Not dead — just paralyzed and looking like someone forgot to turn him over on the grill. Jenny frees him, and after an awkward recovery (involving the most ungainly stagger this side of Frankenstein), the Doctor explains: Mrs. Gillyflower has been using alien goo to “preserve” chosen humans for her utopia. The rest? Discarded as crimson corpses. Clara, naturally, got herself caught in the process — because wandering into cult compounds is basically her brand.

Mrs. Gillyflower, played with glorious menace by Dame Diana Rigg (yes, Emma Peel herself), is on a mission to “purify” humanity. Her partner in crime? A symbiotic red parasite named Mr. Sweet, who has taken up residence as a gross, slug-like creature squelched onto her chest. (Every Victorian tale needs a body horror twist, apparently.)

Ada, her blind daughter, believes her mother’s cause is noble — until she discovers that Mum’s been lying, exploiting her, and using her for experiments. Nothing says “bad parenting” like weaponizing your child for alien science projects.

The climax is pure Who madness: Mrs. Gillyflower tries to launch a rocket filled with crimson poison to wipe out humanity, the Doctor and Clara scramble to stop her, Jenny gets an action-hero moment with her umbrella sword, and Strax tries to blow up Yorkshire with artillery because, well, he’s Strax. Ada turns against her mother in a heartbreaking confrontation, and Mrs. Gillyflower dies in suitably Gothic fashion: tumbling to her doom while the symbiotic Mr. Sweet wriggles helplessly away.

Ada, free at last, smashes the parasite to a pulp with her cane. Catharsis achieved.

The episode wraps up with the Paternoster Gang being brilliant as ever, the Doctor taking Clara home (or trying to), and Clara discovering that the Victorian children she nannies for have figured out her secret — thanks to some suspiciously accurate time-travel photos. Ruh-roh.

Clara gets lost inside the TARDIS, the Doctor plays hide-and-seek with cranky salvage workers, and the interior of the ship tries very hard to kill everyone before tea.

Extended Storyline

We open with three space scavengers — the Van Baalen brothers — whose job is basically “interstellar scrap metal men.” They snag the TARDIS in their salvage ship’s tractor beam, which is roughly as good an idea as trying to tow Godzilla with a bicycle. Unsurprisingly, the TARDIS reacts badly.

The Doctor convinces the brothers to help him search for Clara, who’s trapped somewhere deep inside after the crash. (Convincing here means “lying about a self-destruct sequence and setting a countdown,” because Eleven is nothing if not a drama queen.) Clara, meanwhile, has gone full tourist in the infinite corridors, wandering through bizarre hallways, poking at doors she really shouldn’t, and generally demonstrating the curiosity of a cat in a fireworks factory.

This is where the episode flexes its budget: we finally get glimpses of the TARDIS interior beyond the console room. There’s a vast library with shelves taller than cathedrals, complete with a friendly little book called The History of the Time War that basically contains every spoiler the show has ever teased. Clara even skims a page — and, oh dear, now she knows the Doctor’s real name. (Awkward foreshadowing, party of one.)

Meanwhile, the ship isn’t just sitting back and letting them browse. The damage caused by the salvage crew has destabilized the TARDIS, so it’s spawning corridors that rearrange themselves, time cracks that warp reality, and creepy scorched humanoid figures shambling about. These “time zombies” are revealed to be grotesque echoes of Clara and the others, burned by the engine’s meltdown and looped through time. (Doctor Who, everyone — where even your own corpse gets a cameo.)

The Doctor plays his usual game of bluffing, bargaining, and generally being furious at anyone who mistreats his “beautiful sexy lady spaceship.” Clara, for her part, proves once again that she’s not one to panic — even when being stalked by flaming future versions of herself, she manages quips and bravery in equal measure.

Eventually, the Doctor drags everyone down to the Eye of Harmony (the TARDIS’s star-in-a-bottle engine room, which looks like a cathedral designed by people who really loved lens flares). The only way to reset the ship before it collapses is to basically reboot reality. Clara and the Doctor have a heated heart-to-heart in the middle of all this chaos — Clara confronting him about how much he seems to know about her, the Doctor evading with his usual mix of charm and awkward deflection.

The climax involves the Doctor finding a reset switch, which requires a very “just go with it” temporal paradox. The ship effectively rewinds itself, undoing all the damage, resurrecting the dead, and neatly wiping the brothers’ memories so they don’t remember they were briefly roasted by time fire. Clara, however, retains her memory of the adventure — but not the juicy bit where she peeked at the Doctor’s true name. Lucky for him.

Everyone gets spat out back where they started, the TARDIS good as new, and Clara just a little more suspicious of her enigmatic Time Lord chauffeur. The Van Baalens? They go back to space junking, hopefully having learned “don’t poke the magic box.”

The Doctor and Clara explore a haunted mansion, meet a psychic, chase a “ghost,” and discover it’s all down to time rifts and a creature looking for love. Cue spooky lightning and some surprisingly sweet monster romance.

Extended Storyline

We begin in 1974 at Caliburn House, a mansion so dripping with Gothic atmosphere you half expect Vincent Price to come wafting down the stairs. Inside, Professor Alec Palmer (a war veteran turned ghost hunter) and his assistant Emma Grayling (a psychic empath with enough fringe to qualify as a curtain) are trying to get to the bottom of a local haunting.

Enter the Doctor and Clara, who waltz in pretending to be ghost experts. The Doctor’s all excited — because what’s more fun than a Scooby-Doo mystery with a real specter? Clara, meanwhile, is quietly horrified by the mansion’s “creaky floorboards and definitely cursed wallpaper” vibe.

The ghost in question is known as the “Witch of the Well,” a mysterious figure who appears in photographs taken decades apart — always in the same spot, always looking lost. Emma and Alec think it’s a spirit trapped in the house. The Doctor thinks it’s something far stranger. (And given that he whips out his sonic screwdriver before they’ve even had tea, he’s probably right.)

Cue lots of running around in the dark with cameras, chalk circles, and Clara making the obligatory “Are we sure this is safe?” noises. At one point, the Doctor even lights a candle to stalk the halls like he’s about to narrate Tales from the Crypt. The photos they take reveal the “ghost” is actually a woman — Hila Tukurian, a time traveler stranded in a pocket universe. So, not a ghost. More a temporal tourist who missed her train home by about… forever.

To rescue her, the Doctor rigs up a portal using Emma’s psychic powers, Alec’s war-honed bravery, and his own Time Lord bravado. He leaps into the pocket universe — cue spooky fog, skeletal trees, and a monster lurching out of the shadows. This “Crooked Man,” as fans dubbed it, looks like the result of a skeleton marrying a velociraptor and then deciding to live in a Tim Burton sketchbook.

The Doctor barely makes it back with Hila before the portal collapses. Crisis averted! Except… the Crooked Man wasn’t a monster at all. It’s just the mate of another Crooked Man lurking in Caliburn House. The “ghost story” was never about horror — it was about a pair of alien creatures separated across dimensions, desperately trying to reunite. Basically, it’s an interdimensional rom-com disguised as The Haunting of Hill House.

Meanwhile, Clara has her own emotional subplot. She’s unnerved by seeing Earth’s entire timeline — past, present, and future — in a single sweep of the TARDIS. To her, humanity looks like mayflies, flickering and gone in a heartbeat. The Doctor, for once, doesn’t joke it off; he reassures her, in his awkward Time Lord way, that she matters more to him than she realizes. (File this under “foreshadowing.”)

The story closes with everyone paired off: Alec and Emma admit their feelings for each other, Hila is revealed to be Emma’s far-flung descendant (keeping it all in the family, literally), and the Crooked Couple finally reunite with their ungainly hugs. The Doctor smiles knowingly, Clara rolls her eyes, and somewhere in the BBC production office someone whispers, “Nailed it — we did Gothic horror and a rom-com at the same time.”