The Doctor: Yes. Creatures that stalk in the night and feast on the blood of the living. Creatures that fear sunlight and running water and certain herbs. Creatures that are so strong they can only be killed by beheading, or a stake through the heart.
The one where the Doctor stabs someone with a rocket.
The TARDIS (still in E-Space) lands on a planet that seems to be inhabited only by a single small village full of peasants and a castle occupied by three sinister rulers. This turns out to be because the planet's inhabitants come from a crashed spaceship from Earth; the castle is built from the remains of the spaceship. The captain and his executive officers became the rulers, and the peasants are descended from everybody else.
That's not the interesting bit, though: the interesting bit is that the Three Who Rule are vampires. And they're working to revive their master, a Giant Vampire who fought (and nearly defeated) the Time Lords themselves aeons ago.
The Doctor must answer the question: Just how do you deal with a Giant Vampire? A bit of wood with a point at one end really isn't going to do the job. A giant pointy castle tower, however, will.
Terrance Dicks had originally proposed this story several years earlier, for the slot that ended up going to "Horror of Fang Rock"; it was turned down at the time because the BBC was about to air a big-budget adaptation of Dracula, and they didn't want anybody to think Doctor Who was taking the mickey.
- Alien Blood: The Doctor's blood is blue, though in all other episodes before and since it's been red. The shot was supposed to be replaced, but time ran out and the shot remains in.
- Aristocrats Are Evil
- Character Check: After several serials of the Doctor's characterisation being unusually dark, grumpy and Chessmasterly, this story returns him to the witty and capricious mode he'd been in for the previous three seasons — but the story itself is written with all the characteristic tropes of his first three seasons, being a Gothic Horror Pastiche about weakened ancient godlike beings attempting to regain power.
- Distressed Dude: Adric is captured to be made a vampire.
- Eldritch Abomination: The Great Vampires, who fought the early Time Lords in the war that made the entire species get sick of violence, are gargantuan winged creatures who feast on planets, and can only be killed by having their heart destroyed. But they are so massive that the Time Lords had to invent a new type of ship specifically for hunting them. The only way the Doctor managed to best the one he encountered was by stabbing it with a rocket ship.
- Evil Tower of Ominousness: The Tower of the Three Who Rule. This being Doctor Who, the Tower is really a crashed, defunct spaceship.
- Exposition of Immortality: Photos of the Three Who Rule are found by the Doctor in the databanks of the rebel's computer, confirming his suspicions that there's something not quite right and that they've been around for millenia.
- Fake Defector: After spending a couple episodes under mind control, Adric pretends to side with the Three Who Rule so he can safely wait for an opening to save Romana. This plan does not work, but at least he apologizes.
- Feudal Future / Medieval Stasis: Enforced by the Three Who Rule
- Getting Crap Past the Radar: Camilla is a pretty obvious Lesbian Vampire and molests Romana. She also describes Adric (who's around fourteen to sixteen years old) as a "handsome child" in a tone reminiscent of an older woman out to "make a man" of an innocent young boy.
- When Camilla says to Romana, "There are compensations," the look on her face clearly says, "like jumping your bones."
- The Guards Must Be Crazy: Both averted and played straight — one of the guards recognises that the man claiming to be a guard is, in fact, a known deserter. But the other doesn't... and falls for "the old prisoner trick".
- Impaled with Extreme Prejudice: The Doctor stabs the Giant Vampire through the heart with a rocketship.
- Kneel Before Zod: Aukon uses his powers to force the Doctor to kneel.
- Lesbian Vampire: Camilla (the name's a giveaway) seems very interested in Romana.
- Looks Like Cesare: The Three.
- Meaningful Echo: That delightful Ship Tease moment between our two Time Lords."Psst. You're wonderful."
"I suppose I am. I never really thought about it, really."
- The Necrocracy: The planet was ruled over by evil vampires, and the rulers had been dining on the mortal population for so long that it was down to a single small village.
- No Immortal Inertia: Aukon, Camilla and Zargo crumble to dust when the Great Vampire is destroyed.
- Ooh, Me Accent's Slipping: "And certain 'erbs". Tom Baker slips out of his BBC English accent for a second.
- Our Vampires Are Different: The Three Who Rule are pretty standard Hammer Horror vampires, but the gigantic ur-Vampire certainly qualifies as Different.
- Percussive Maintenance: Twice. That's Earth craftsmanship for you...
- La Résistance
- Resistance Is Futile: Marta says this is the villagers' lot in life, ruled by the Three.
- Shout-Out to Shakespeare: The Doctor quotes Henry V to inspire the rebels:Lack of weapons. No experience. Odds almost insurmountable. But! He who outlives this day and comes safe home shall stand a-tiptoe when this day is named and rouse him at the name of E-space!
- Stock Poses: The peasants give a complex salute to their lords, covering their ears, eyes and mouths. This is a reference to the Three Wise Monkeys, "See no evil, hear no evil, say no evil."
- Supernatural Elite: The Three Who Rule are vampires, feeding off the peasants whom they rule.
- Take a Third Option:
- Title Drop
- Torches and Pitchforks: The Doctor persuades the peasants to attack the castle of their tyrannical rulers (actually a spaceship embedded in the ground) with a rousing speech that's paraphrased from the St. Crispin's Day speech in Henry V. A mob scene with torches and pitchforks ensues.
- Trojan Prisoner: Romana poses as Tarak's prisoner to allow them to sneak into the tower to rescue Adric.
- Überwald: The unnamed planet is essentially Überwald as a Planet of Hats.
- Vampire Monarch: The head vampire is an Eldritch Abomination. Once the Doctor stakes it with a rocket ship, the other (human) vampires crumble to dust.
- We Have Reserves: Aukon's attitute to his guards.Aukon: The guards must hold the tower to the last man.
Guard: We are outnumbered. Unless you aid us we shall all be killed!
Aukon: Then die. That is the purpose of guards.
- What Happened to the Mouse?: The topic of "The Wasting" comes up several times during the first episode as something the peasants dread and will not discuss. It seems significant, but once episode one ends, it's never mentioned again. This is apparently a hangover from a much early draft of the script.
- When Props Attack: When the Doctor is attacked by the bat, its flight is achieved by pulling it away from Tom Baker on a string and reversing the film, but the actual attack is Baker holding the prop to his throat and struggling.