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** "[[Recap/DoctorWhoS2E4TheRomans The Romans]]": Nero, who takes the Doctor and his companions captive shortly after their arrival in Rome.
to:
** "[[Recap/DoctorWhoS2E4TheRomans The Romans]]": Nero, who takes is the biggest threat to the Doctor and his companions captive shortly after during their arrival time in in Rome.
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** "[[Recap/DoctorWhoS3E5TheMassacre The Massacre]]": Catherine de Medici.
to:
** "[[Recap/DoctorWhoS3E5TheMassacre The Massacre]]": Catherine de Medici.Medici, who is behind the attempted assassination of Admiral de Coligny and the St Bartholomew's Day Massacre.
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** "[[Recap/DoctorWhoS11E4TheMonsterOfPeladon The Monster of Peladon]]": A BigBadDuumvirate between the Ice Warrior leader Azaxyr and EvilChancellor Eckersley.
to:
** "[[Recap/DoctorWhoS11E4TheMonsterOfPeladon The Monster of Peladon]]": A BigBadDuumvirate between the Ice Warrior leader Azaxyr and EvilChancellor TheMole Federation miner Eckersley.
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** "[[Recap/DoctorWhoS8E5TheDaemons The Daemons]]": The Master, who set things off with his scheme to gain Azal's powers.
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** "[[Recap/DoctorWhoS8E5TheDaemons The Daemons]]": The Master, who set sets things off with his scheme to gain Azal's powers.
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** "[[Recap/DoctorWhoS21E4ResurrectionOfTheDaleks Resurrection of the Daleks]]": Davros and the Supreme Dalek, leading the Imperial Daleks and Renegade Daleks in opposite sides of an EnemyCivilWar.
to:
** "[[Recap/DoctorWhoS21E4ResurrectionOfTheDaleks Resurrection of the Daleks]]": Davros and the Supreme Dalek, leading the Imperial Daleks who both have their own agendas and Renegade Daleks in opposite sides of an EnemyCivilWar.end up clashing.
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** "[[Recap/DoctorWhoS21E6TheCavesOfAndrozani The Caves of Androzani]]": Morgus is arguably the story's most irredeemable and prominent villain, but notably he never actually meets the Doctor face-to-face.
to:
** "[[Recap/DoctorWhoS21E6TheCavesOfAndrozani The Caves of Androzani]]": Morgus is arguably Morgus, the story's most irredeemable and prominent villain, but notably he never actually meets the Doctor face-to-face.
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* Series 6: Madame Kovarian and the Order of the Silence for the season-long arc. The Silence's plotting actually encompasses the entirety of the Eleventh Doctor's MythArc, but they are not formally revealed in Series 5 and are absent in Series 7, only returning in his GrandFinale ChristmasEpisode.
** "[[Recap/DoctorWhoS32E5TheRebelFlesh The Rebel Flesh]]"/"[[Recap/DoctorWhoS32E6TheAlmostPeople The Almost People]]" at first has Foreman Cleaves due to her dehumanizing treatment of the Gangers, but the role is eventually taken by Ganger Jennifer after she leads the Gangers in an uprising with the intent of waging war on the whole of humanity.
* Series 7B: The Great Intelligence.
** "[[Recap/DoctorWhoS32E5TheRebelFlesh The Rebel Flesh]]"/"[[Recap/DoctorWhoS32E6TheAlmostPeople The Almost People]]" at first has Foreman Cleaves due to her dehumanizing treatment of the Gangers, but the role is eventually taken by Ganger Jennifer after she leads the Gangers in an uprising with the intent of waging war on the whole of humanity.
* Series 7B: The Great Intelligence.
to:
* Series 6: Madame Kovarian and the Order of the Silence for the season-long arc. The Silence's plotting actually encompasses the entirety of the Eleventh Doctor's MythArc, but they are not formally revealed in Series 5 and are absent in Series 7, only returning in his GrandFinale ChristmasEpisode.
**"[[Recap/DoctorWhoS32E5TheRebelFlesh The Rebel Flesh]]"/"[[Recap/DoctorWhoS32E6TheAlmostPeople The Almost People]]" at first has Foreman Cleaves due to her dehumanizing treatment of the Gangers, but the role is eventually taken by Ganger Jennifer after she leads the Gangers in an uprising with the intent of waging war on the whole of humanity.
* Series 7B: The Great Intelligence.humanity.
**
* Series 7B: The Great Intelligence.
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* Series 10: The "[[Recap/DoctorWhoS36E6Extremis Extremis]]"/"[[Recap/DoctorWhoS36E7ThePyramidAtTheEndOfTheWorld The Pyramid at the End of the World]]"/"[[Recap/DoctorWhoS36E8TheLieOfTheLand The Lie of the Land]]" three-parter has the Head Monk, leader of the Monk invaders.
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** "[[Recap/DoctorWhoS35E3UnderTheLake Under The Lake]]"/"[[Recap/DoctorWhoS35E4BeforeTheFlood]]" has the Fisher King, the evil entity behind the hostile ghosts. Although [[spoiler:by the present time the first part takes place, he's already been stopped by the Doctor traveling back in time in the second part, with the ghosts being after-effects from his plan.]]
to:
** "[[Recap/DoctorWhoS35E3UnderTheLake Under The Lake]]"/"[[Recap/DoctorWhoS35E4BeforeTheFlood]]" Lake]]"/"[[Recap/DoctorWhoS35E4BeforeTheFlood Before The Flood]]" has the Fisher King, the evil entity behind the hostile ghosts. Although [[spoiler:by the present time the first part takes place, he's already been stopped by the Doctor traveling back in time in the second part, with the ghosts being after-effects from his plan.]]
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** "[[Recap/DoctorWhoS35E7TheZygonInvasion The Zygon Invasion]]"/"[[Recap/DoctorWhoS35E8The Zygon Inversion]]" has Bonnie the Zygon, leader of the RenegadeSplinterFaction of Zygons looking to make war on the human race.
to:
** "[[Recap/DoctorWhoS35E7TheZygonInvasion The Zygon Invasion]]"/"[[Recap/DoctorWhoS35E8The Invasion]]"/"[[Recap/DoctorWhoS35E8TheZygonInversion The Zygon Inversion]]" has Bonnie the Zygon, leader of the RenegadeSplinterFaction of Zygons looking to make war on the human race.
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* Being more arc-based than other revival era seasons, Series 9 naturally has several.
** "[[Recap/DoctorWhoS35E1TheMagiciansApprentice The Magician's Apprentice]]"/"[[Recap/DoctorWhoS35E2TheWitchsFamiliar The Witch's Familiar]]" has Davros, who lures the Doctor to Skaro in a gambit to steal his regeneration energy.
** "[[Recap/DoctorWhoS35E3UnderTheLake Under The Lake]]"/"[[Recap/DoctorWhoS35E4BeforeTheFlood]]" has the Fisher King, the evil entity behind the hostile ghosts. Although [[spoiler:by the present time the first part takes place, he's already been stopped by the Doctor traveling back in time in the second part, with the ghosts being after-effects from his plan.]]
** "[[Recap/DoctorWhoS35E7TheZygonInvasion The Zygon Invasion]]"/"[[Recap/DoctorWhoS35E8The Zygon Inversion]]" has Bonnie the Zygon, leader of the RenegadeSplinterFaction of Zygons looking to make war on the human race.
** "[[Recap/DoctorWhoS35E1TheMagiciansApprentice The Magician's Apprentice]]"/"[[Recap/DoctorWhoS35E2TheWitchsFamiliar The Witch's Familiar]]" has Davros, who lures the Doctor to Skaro in a gambit to steal his regeneration energy.
** "[[Recap/DoctorWhoS35E3UnderTheLake Under The Lake]]"/"[[Recap/DoctorWhoS35E4BeforeTheFlood]]" has the Fisher King, the evil entity behind the hostile ghosts. Although [[spoiler:by the present time the first part takes place, he's already been stopped by the Doctor traveling back in time in the second part, with the ghosts being after-effects from his plan.]]
** "[[Recap/DoctorWhoS35E7TheZygonInvasion The Zygon Invasion]]"/"[[Recap/DoctorWhoS35E8The Zygon Inversion]]" has Bonnie the Zygon, leader of the RenegadeSplinterFaction of Zygons looking to make war on the human race.
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** "[[Recap/DoctorWhoS12E1Robot Robot]]": For most of the story, it's Hilda Winters, although the K1 Robot ends up being the Final Boss.
** "[[Recap/DoctorWhoS12E2TheArkInSpace The Ark in Space]]": The Wirrn, with Noah functioning as the swarm leader until his Heel–Face Turn.
** "[[Recap/DoctorWhoS12E2TheArkInSpace The Ark in Space]]": The Wirrn, with Noah functioning as the swarm leader until his Heel–Face Turn.
to:
** "[[Recap/DoctorWhoS12E1Robot Robot]]": For most of the story, it's Hilda Winters, although the K1 Robot ends up being the Final Boss.
FinalBoss.
** "[[Recap/DoctorWhoS12E2TheArkInSpace The Ark in Space]]": The Wirrn, with Noah functioning as the swarm leader until hisHeel–Face Turn.HeelFaceTurn.
** "[[Recap/DoctorWhoS12E2TheArkInSpace The Ark in Space]]": The Wirrn, with Noah functioning as the swarm leader until his
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** "[[Recap/DoctorWhoS18E1TheLeisureHive The Leisure Hive]]": The initial problems are caused by the West Lodge Foamasi, whose leader is posing as Brock, as they sabotage the Leisure Hive in the hope of buying it up. However, the hawkish Argolin Pangol becomes more and more of a threat as he plans to lead the Argolins back into war with an army of clones, ultimately serving as the Final Boss.
to:
** "[[Recap/DoctorWhoS18E1TheLeisureHive The Leisure Hive]]": The initial problems are caused by the West Lodge Foamasi, whose leader is posing as Brock, as they sabotage the Leisure Hive in the hope of buying it up. However, the hawkish Argolin Pangol becomes more and more of a threat as he plans to lead the Argolins back into war with an army of clones, ultimately serving as the Final Boss.FinalBoss.
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** "[[Recap/DoctorWhoS18E7Logopolis Logopolis]]": The Master. Although much of the destruction he causes is accidental and he ends up in an Enemy Mine with the Doctor for a while, he's quick to revert to his usual ways once he's in a position to do so.
to:
** "[[Recap/DoctorWhoS18E7Logopolis Logopolis]]": The Master. Although much of the destruction he causes is accidental and he ends up in an Enemy Mine EnemyMine with the Doctor for a while, he's quick to revert to his usual ways once he's in a position to do so.
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** "[[Recap/DoctorWhoS26E2GhostLight Ghost Light]]": Light. For much of the story, he's a SealedEvilInACan but becomes the Final Boss after the Doctor releases him in the hope he'll take care of Starter Villain Josiah Samuel Smith.
to:
** "[[Recap/DoctorWhoS26E2GhostLight Ghost Light]]": Light. For much of the story, he's a SealedEvilInACan but becomes the Final Boss FinalBoss after the Doctor releases him in the hope he'll take care of Starter Villain Josiah Samuel Smith.
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* Series 6: Madame Kovarian and the Order of the Silence. The Silence's plotting actually encompasses the entirety of the Eleventh Doctor's MythArc, but they are not formally revealed in Series 5 and are absent in Series 7, only returning in his GrandFinale ChristmasEpisode.
to:
* Series 6: Madame Kovarian and the Order of the Silence. Silence for the season-long arc. The Silence's plotting actually encompasses the entirety of the Eleventh Doctor's MythArc, but they are not formally revealed in Series 5 and are absent in Series 7, only returning in his GrandFinale ChristmasEpisode.ChristmasEpisode.
** "[[Recap/DoctorWhoS32E5TheRebelFlesh The Rebel Flesh]]"/"[[Recap/DoctorWhoS32E6TheAlmostPeople The Almost People]]" at first has Foreman Cleaves due to her dehumanizing treatment of the Gangers, but the role is eventually taken by Ganger Jennifer after she leads the Gangers in an uprising with the intent of waging war on the whole of humanity.
** "[[Recap/DoctorWhoS32E5TheRebelFlesh The Rebel Flesh]]"/"[[Recap/DoctorWhoS32E6TheAlmostPeople The Almost People]]" at first has Foreman Cleaves due to her dehumanizing treatment of the Gangers, but the role is eventually taken by Ganger Jennifer after she leads the Gangers in an uprising with the intent of waging war on the whole of humanity.
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** "[[Recap/DoctorWhoS29E4DaleksInManhattan Daleks in Manhattan]]"/"[[Recap/DoctorWhoS29E5EvolutionOfTheDaleks Evolution of the Daleks]]" has the Cult of Skaro, returning after their appearance in the Series 2 finale.
to:
** "[[Recap/DoctorWhoS29E4DaleksInManhattan Daleks in Manhattan]]"/"[[Recap/DoctorWhoS29E5EvolutionOfTheDaleks Evolution of the Daleks]]" has the Cult of Skaro, returning after their appearance in [[Recap/DoctorWhoS28E13Doomsday the Series 2 finale.finale]].
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** "[[Recap/DoctorWhoS26E3TheCurseOfFenric The Curse of Fenric]]": The titular Fenric, who turns out to have been the BigBad the Seventh Doctor's era as a whole.
to:
** "[[Recap/DoctorWhoS26E3TheCurseOfFenric The Curse of Fenric]]": The titular Fenric, who turns out to have been the BigBad of the Seventh Doctor's era as a whole.
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* Series 11: [[spoiler: Tzim-Sha ultimately serves as the main threat of the opener and closer, and his actions, mostly his part in Grace's death, provide the arc of the overall series.]]
to:
* Series 11: [[spoiler: Tzim-Sha ultimately serves as the main threat of the opener [[Recap/DoctorWhoS37E1TheWomanWhoFellToEarth opener]] and closer, [[Recap/DoctorWhoS37E10TheBattleOfRanskoorAvKolos closer]], and his actions, mostly his part in Grace's death, provide the arc of the overall series.]]
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** "[[Recap/DoctorWhoS1E1AnUnearthlyChild An Unearthly Child]]": Kal the Caveman, the first in a long line of Doctor Who villains and the person responsible for its first two deaths before becoming the third.
** "[[Recap/DoctorWhoS1E2TheDaleks The Daleks]]" has of course the Daleks, who would quickly become the Big Bads of the series as a whole.
** "[[Recap/DoctorWhoS1E2TheDaleks The Daleks]]" has of course the Daleks, who would quickly become the Big Bads of the series as a whole.
to:
** "[[Recap/DoctorWhoS1E1AnUnearthlyChild An Unearthly Child]]": Kal the Caveman, the first in a long line of Doctor Who ''Doctor Who'' villains and the person responsible for its first two deaths before becoming the third.
** "[[Recap/DoctorWhoS1E2TheDaleks The Daleks]]" has of course the Daleks, who would quickly become theBig Bads {{Big Bad}}s of the series as a whole.
** "[[Recap/DoctorWhoS1E2TheDaleks The Daleks]]" has of course the Daleks, who would quickly become the
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** "[[Recap/DoctorWhoS3E3TheMythMakers The Myth Makers]]": As far as the Greek army the Doctor allies with are concerned, it's King Priam, although it's more a case of Grey-and-Gray Morality.
to:
** "[[Recap/DoctorWhoS3E3TheMythMakers The Myth Makers]]": As far as the Greek army the Doctor allies with are concerned, it's King Priam, although it's more a case of Grey-and-Gray Morality.GreyAndGrayMorality.
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** "[[Recap/DoctorWhoS3E9TheSavages The Savages]]": Initially Jano. After his Heel–Face Turn, Captain Edal becomes the member of the Elders most determined to preserve the status quo.
to:
** "[[Recap/DoctorWhoS3E9TheSavages The Savages]]": Initially Jano. After his Heel–Face Turn, HeelFaceTurn, Captain Edal becomes the member of the Elders most determined to preserve the status quo.
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** "[[Recap/DoctorWhoS7E1SpearheadFromSpace Spearhead from Space]]": The Nestene Consciousness, with Channing acting as [[The Heavy the face]] of its Autons.
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** "[[Recap/DoctorWhoS7E1SpearheadFromSpace Spearhead from Space]]": The Nestene Consciousness, with Channing acting as [[The Heavy [[TheHeavy the face]] of its Autons.
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** "[[Recap/DoctorWhoS7E4Inferno Inferno]]": Professor Stahlman. For the most part, he's an Unwitting Instigator of Doom, but his resorting to threats and sabotage so nothing stops "his" project are the cause of most of the problems in the story.
to:
** "[[Recap/DoctorWhoS7E4Inferno Inferno]]": Professor Stahlman. For the most part, he's an Unwitting Instigator of Doom, UnwittingInstigatorOfDoom, but his resorting to threats and sabotage so nothing stops "his" project are the cause of most of the problems in the story.
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** "[[Recap/DoctorWhoS13E6TheSeedsOfDoom The Seeds of Doom]]": Harrison Chase, although by the last episode he's basically become The Dragon for the Krynoid.
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** "[[Recap/DoctorWhoS13E6TheSeedsOfDoom The Seeds of Doom]]": Harrison Chase, although by the last episode he's basically become The Dragon TheDragon for the Krynoid.
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** "[[Recap/DoctorWhoS14E4TheFaceOfEvil The Face of Evil]]": Xoanon, who unusually ends up undergoing a Heel–Face Turn.
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** "[[Recap/DoctorWhoS14E4TheFaceOfEvil The Face of Evil]]": Xoanon, who unusually ends up undergoing a Heel–Face Turn.HeelFaceTurn.
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* Series 5:
** "[[Recap/DoctorWhoS31E4TheTimeOfAngels The Time of Angels]]"/"[[Recap/DoctorWhoS31E5FleshAndStone Flesh and Stone]]" has the Weeping Angels.
** "[[Recap/DoctorWhoS31E8TheHungryEarth The Hungry Earth]]"/"[[Recap/DoctorWhoS31E9ColdBlood Cold Blood]]": Commander Restac, leader of the hostile Silurians.
** "[[Recap/DoctorWhoS31E4TheTimeOfAngels The Time of Angels]]"/"[[Recap/DoctorWhoS31E5FleshAndStone Flesh and Stone]]" has the Weeping Angels.
** "[[Recap/DoctorWhoS31E8TheHungryEarth The Hungry Earth]]"/"[[Recap/DoctorWhoS31E9ColdBlood Cold Blood]]": Commander Restac, leader of the hostile Silurians.
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* The "[[Recap/DoctorWhoS27E4AliensOfLondon Aliens of London]]"/"[[Recap/DoctorWhoS27E5WorldWarThree World War Three]]" two-parter in Series 1 has the Slitheen Family, chiefly Jocrassa Fel Fotch Pasameer Day Slitheen, the ringleader of their plan.
* Series 2:
** "[[Recap/DoctorWhoS28E5RiseOfTheCybermen Rise of the Cybermen]]"/"[[Recap/DoctorWhoS28E6TheAgeOfSteel The Age of Steel]]" has [[CorruptCorporateExecutive John Lumic]], creator of the alternate universe versions of the Cybermen.
** "[[Recap/DoctorWhoS28E8TheImpossiblePlanet The Impossible Planet]]"/"[[Recap/DoctorWhoS28E9TheSatanPit The Satan Pit]]" has [[BigRedDevil the Beast]]
* Series 2:
** "[[Recap/DoctorWhoS28E5RiseOfTheCybermen Rise of the Cybermen]]"/"[[Recap/DoctorWhoS28E6TheAgeOfSteel The Age of Steel]]" has [[CorruptCorporateExecutive John Lumic]], creator of the alternate universe versions of the Cybermen.
** "[[Recap/DoctorWhoS28E8TheImpossiblePlanet The Impossible Planet]]"/"[[Recap/DoctorWhoS28E9TheSatanPit The Satan Pit]]" has [[BigRedDevil the Beast]]
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** "[[Recap/DoctorWhoS29E4DaleksInManhattan Daleks in Manhattan]]"/"[[Recap/DoctorWhoS29E5EvolutionOfTheDaleks Evolution of the Daleks]]" has the Cult of Skaro, returning after their appearance in the Series 2 finale.
** "[[Recap/DoctorWhoS29E8HumanNature Human Nature]]"/"[[Recap/DoctorWhoS29E9TheFamilyOfBlood The Family of Blood]]" has the titular Family of Blood, who are hunting the Doctor.
* Series 4:
** "[[Recap/DoctorWhoS30E4TheSontaranStratagem The Sontaran Stratagem]]"/"[[Recap/DoctorWhoS30E5ThePoisonSky The Poison Sky]]" has General Staal, commander of the Sontaran invasion forces.
** "[[Recap/DoctorWhoS30E8SilenceInTheLibrary Silence in the Library]]"/"[[Recap/DoctorWhoS30E9ForestOfTheDead Forest of the Dead]]" has the Vashta Narada.
** "[[Recap/DoctorWhoS29E8HumanNature Human Nature]]"/"[[Recap/DoctorWhoS29E9TheFamilyOfBlood The Family of Blood]]" has the titular Family of Blood, who are hunting the Doctor.
* Series 4:
** "[[Recap/DoctorWhoS30E4TheSontaranStratagem The Sontaran Stratagem]]"/"[[Recap/DoctorWhoS30E5ThePoisonSky The Poison Sky]]" has General Staal, commander of the Sontaran invasion forces.
** "[[Recap/DoctorWhoS30E8SilenceInTheLibrary Silence in the Library]]"/"[[Recap/DoctorWhoS30E9ForestOfTheDead Forest of the Dead]]" has the Vashta Narada.
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** "[[Recap/DoctorWhoS3E2MissionToTheUnknown To The Unknown]]": The black Dalek heading the Dalek council and their plot.
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** "[[Recap/DoctorWhoS3E2MissionToTheUnknown Mission To The Unknown]]": The black Dalek heading the Dalek council and their plot.
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** [[Recap/DoctorWhoS2E3TheRescue The Rescue]]" two parter has Bennett, who set the whole Koquillion masquerade up to disguise acts of mass murder and genocide.
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** [[Recap/DoctorWhoS2E3TheRescue "[[Recap/DoctorWhoS2E3TheRescue The Rescue]]" two parter has Bennett, who set the whole Koquillion masquerade up to disguise acts of mass murder and genocide.
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** The "[[Recap/DoctorWhoS2E3TheRescue Rescue]]" two parter has Bennett, who set the whole Koquillion masquerade up to disguise acts of mass murder and genocide.
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** [[Recap/DoctorWhoS2E3TheRescue The "[[Recap/DoctorWhoS2E3TheRescue Rescue]]" two parter has Bennett, who set the whole Koquillion masquerade up to disguise acts of mass murder and genocide.
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Very common in ''Series/DoctorWho'', particularly during the Classic Series when it was comprised of multi-episode serials. Less so the Revival Series, which tended to have standalone episodes or two-parters, though it still had some season-long threats.
!!Classic Series
* Season 1:
** "[[Recap/DoctorWhoS1E1AnUnearthlyChild An Unearthly Child]]": Kal the Caveman, the first in a long line of Doctor Who villains and the person responsible for its first two deaths before becoming the third.
** "[[Recap/DoctorWhoS1E2TheDaleks The Daleks]]" has of course the Daleks, who would quickly become the Big Bads of the series as a whole.
** "[[Recap/DoctorWhoS1E4MarcoPolo Marco Polo]]": Tegana, who is responsible for the acts of sabotage against Marco's party, directing the bandits that harass them and attempting to assassinate the Khan. His master Noghai serves as the GreaterScopeVillain.
** "[[Recap/DoctorWhoS1E5TheKeysOfMarinus The Keys of Marinus]]": Yartek. He doesn't appear until the last episode but it is his actions that prompt the Doctor's party to go on their quest to find a way to defeat him.
** "[[Recap/DoctorWhoS1E6TheAztecs The Aztecs]]": Tlotoxl, an Aztec high priest who plots against Barbara after she's mistaken for a goddess.
** "[[Recap/DoctorWhoS1E7TheSensorites The Sensorites]]": The human Commander. His poisoning of the water supply has caused all the Sensorite deaths, leading to their hostility towards the new human ship and arguably to the City Administrator's Start of Darkness.
** "[[Recap/DoctorWhoS1E8TheReignOfTerror The Reign of Terror]]": Maximilien Robespierre, as the leader of the Revolution which causes all the Doctor and company's problems (at least until the end).
* Season 2:
** "[[Recap/DoctorWhoS2E1PlanetOfGiants Planet of Giants]]": Forester, a ruthless businessmen looking to launch a new insecticide harmful to life.
** "[[Recap/DoctorWhoS2E2TheDalekInvasionOfEarth The Dalek Invasion of Earth]]": The black Supreme Dalek in charge of the Dalek-occupied Earth, with the referenced Dalek Supreme Command as the {{Greater Scope Villain}}s.
** The "[[Recap/DoctorWhoS2E3TheRescue Rescue]]" two parter has Bennett, who set the whole Koquillion masquerade up to disguise acts of mass murder and genocide.
** "[[Recap/DoctorWhoS2E4TheRomans The Romans]]": Nero, who takes the Doctor and his companions captive shortly after their arrival in Rome.
** "[[Recap/DoctorWhoS2E5TheWebPlanet The Web Planet]]": The Animus, a being seeking to envelop Planet Vortis in webs.
** "[[Recap/DoctorWhoS2E6TheCrusade The Crusade]]": El Akir. Technically, he's a subject of Saladin, but after his failure to capture King Richard, his schemes are solely for his own gratification rather than for the sake of the Saracen cause.
** "[[Recap/DoctorWhoS2E7TheSpaceMuseum The Space Museum]]": Governor Lobos, the leader of the Morok forces on Xeros.
** "[[Recap/DoctorWhoS2E8TheChase The Chase]]": The black Supreme Dalek dispatching the assassination squad after the TARDIS crew.
** "[[Recap/DoctorWhoS2E9TheTimeMeddler The Time Meddler]]": The Meddling Monk, who plots to alter history so the English will "have jetlines by 1320."
* Season 3:
** "[[Recap/DoctorWhoS3E1Galaxy4 Galaxy 4]]": Maaga, leader of the war-like Drahvins.
** "[[Recap/DoctorWhoS3E2MissionToTheUnknown To The Unknown]]": The black Dalek heading the Dalek council and their plot.
** "[[Recap/DoctorWhoS3E3TheMythMakers The Myth Makers]]": As far as the Greek army the Doctor allies with are concerned, it's King Priam, although it's more a case of Grey-and-Gray Morality.
** "[[Recap/DoctorWhoS3E4TheDaleksMasterPlan The Daleks' Master Plan]]": The Supreme Dalek in charge of the Dalek forces on Kembel.
** "[[Recap/DoctorWhoS3E5TheMassacre The Massacre]]": Catherine de Medici.
** "[[Recap/DoctorWhoS3E6TheArk The Ark]]": Monoid One, who plans to leave all the humans behind on the Ark and then destroy it with a bomb.
** "[[Recap/DoctorWhoS3E7TheCelestialToymaker The Celestial Toymaker]]" has the titular Toymaker.
** "[[Recap/DoctorWhoS3E8TheGunfighters The Gunfighters]]": Pa Clanton is the head of the family and encourages his sons in their vendetta against Holliday and the Earps.
** "[[Recap/DoctorWhoS3E9TheSavages The Savages]]": Initially Jano. After his Heel–Face Turn, Captain Edal becomes the member of the Elders most determined to preserve the status quo.
** "[[Recap/DoctorWhoS3E10TheWarMachines The War-Machines]]": WOTAN, a power hungry and malevolent computer.
* Season 4:
** "[[Recap/DoctorWhoS4E1TheSmugglers The Smugglers]]": Captain Samuel Pike, the leader of the pirates.
** "[[Recap/DoctorWhoS4E2TheTenthPlanet The Tenth Planet]]": Gern, the Cyberman who takes over Geneva and is said to be in charge of their forces on Earth.
** "[[Recap/DoctorWhoS4E3ThePowerOfTheDaleks The Power of the Daleks]]": The Daleks. Various human schemers plot to use them to their advantage, but the Daleks eventually trump all of them.
** "[[Recap/DoctorWhoS4E4TheHighlanders The Highlanders]]": Grey, a crooked solicitor who is selling captured Highland clansmen into slavery in the West Indies.
** "[[Recap/DoctorWhoS4E5TheUnderwaterMenace The Underwater Menace]]": Professor Zaroff, a GenericDoomsdayVillain who plans to drain the ocean into the Earth's core and thereby destroy the planet.
** "[[Recap/DoctorWhoS4E6TheMoonbase The Moonbase]]": The Cybermen, at it again.
** "[[Recap/DoctorWhoS4E7TheMacraTerror The Macra Terror]]": The Macra, specifically the one known as Control.
** "[[Recap/DoctorWhoS4E8TheFacelessOnes The Faceless Ones]]": The Chameleon Director, who is co-ordinating the operation from their space station.
** "[[Recap/DoctorWhoS4E9TheEvilOfTheDaleks The Evil of the Daleks]]": The Dalek Emperor, who is also implicitly the GreaterScopeVillain for all the previous Dalek stories.
* Season 5:
** "[[Recap/DoctorWhoS5E1TheTombOfTheCybermen The Tomb of the Cybermen]]": The Cyber-Controller, supreme leader of the Cybermen.
** "[[Recap/DoctorWhoS5E2TheAbominableSnowmen The Abominable Snowmen]]": The Great Intelligence, an intangible being trying to create a form for itself in order to take over the Earth.
** "[[Recap/DoctorWhoS5E3TheIceWarriors The Ice Warriors]]": Varga, commander of the Ice Warriors plotting to take over Earth.
** "[[Recap/DoctorWhoS5E4TheEnemyOfTheWorld The Enemy of the World]]": Ramon Salamander, a DiabolicalMastermind plotting to take over the world.
** "[[Recap/DoctorWhoS5E5TheWebOfFear The Web of Fear]]": The Great Intelligence again.
** "[[Recap/DoctorWhoS5E6FuryFromTheDeep Fury From the Deep]]": The Weed Creature infesting the natural gas refinery.
** "[[Recap/DoctorWhoS5E7TheWheelInSpace The Wheel in Space]]": The Cyber-Planner, who directs the Cybermen on the Silver Carrier and the Wheel from their mother ship.
* Season 6:
** "[[Recap/DoctorWhoS6E1TheDominators The Dominators]]": Navigator Rago, the senior Dominator.
** "[[Recap/DoctorWhoS6E2TheMindRobber The Mind Robber]]": The Master Brain computer.
** "[[Recap/DoctorWhoS6E3TheInvasion The Invasion]]": Tobias Vaughn, at least until the Cybermen well and truly prove to be Eviler than Thou.
** "[[Recap/DoctorWhoS6E4TheKrotons The Krotons]]: The titular Krotons.
** "[[Recap/DoctorWhoS6E5TheSeedsOfDeath The Seed of Death]]": Slaar, the leader of the Ice Warriors who take over the moon.
** "[[Recap/DoctorWhoS6E6TheSpacePirates The Space Pirates]]": Maurice Caven, leader of the titular pirates.
** "[[Recap/DoctorWhoS6E7TheWarGames The War Games]]": The War Lord, leader of the evil aliens.
* Season 7:
** "[[Recap/DoctorWhoS7E1SpearheadFromSpace Spearhead from Space]]": The Nestene Consciousness, with Channing acting as [[The Heavy the face]] of its Autons.
** "[[Recap/DoctorWhoS7E2DoctorWhoAndTheSilurians Doctor Who and the Silurians]]": The Young Silurian. He is technically subordinate to the Old Silurian at first but has the virus intended to kill the humans released entirely on his own authority and, when he finds the Old Silurian has given the Doctor the means to find a cure, kills him and takes over.
** "[[Recap/DoctorWhoS7E3TheAmbassadorsOfDeath The Ambassador of Death]]": General Carrington, who's behind the kidnappings of the ambassadors.
** "[[Recap/DoctorWhoS7E4Inferno Inferno]]": Professor Stahlman. For the most part, he's an Unwitting Instigator of Doom, but his resorting to threats and sabotage so nothing stops "his" project are the cause of most of the problems in the story.
* Season 8: The Master acts as this for the season as a whole, although each story features him working with a different villain.
** "[[Recap/DoctorWhoS8E1TerrorOfTheAutons Terror of the Autons]]": The Nestene Consciousness again. The Master starts off working with it but later forms an EnemyMine with the Doctor against it.
** "[[Recap/DoctorWhoS8E2TheMindOfEvil The Mind of Evil]]": The Master, taking center stage in this story arc with his plot to start WorldWarIII.
** "[[Recap/DoctorWhoS8E3TheClawsOfAxos The Claws of Axos]]: Axos, who the Master starts off aligned with but eventually teams up with the Doctor against.
** "[[Recap/DoctorWhoS8E4ColonyInSpace Colony in Space]]": Captain Dent, forming a BigBadEnsemble with the Master.
** "[[Recap/DoctorWhoS8E5TheDaemons The Daemons]]": The Master, who set things off with his scheme to gain Azal's powers.
* Season 9:
** "[[Recap/DoctorWhoS9E1DayOfTheDaleks Day of the Daleks]]": The gold Supreme Dalek, who's in charge of the Dalek forces on Earth.
** "[[Recap/DoctorWhoS9E2TheCurseOfPeladon The Curse of Peladon]]": A BigBadDuumvirate of Arcturus and Hepesh.
** "[[Recap/DoctorWhoS9E3TheSeaDevils The Sea Devils]]": The Chief Sea Devil [[BigBadDuumvirate and]] the Master, until the Sea Devils betray the Master and he allies with the Doctor against them.
** "[[Recap/DoctorWhoS9E4TheMutants The Mutants]]": The Marshal, who seeks to prevent Solos from becoming independent of Earth's Empire.
** "[[Recap/DoctorWhoS9E5TheTimeMonster The Time Monster]]": The Master, who schemes to take control of Kronos.
* Season 10:
** "[[Recap/DoctorWhoS10E1TheThreeDoctors The Three Doctors]]" has the renegade Time Lord founder Omega.
** "[[Recap/DoctorWhoS10E2CarnivalOfMonsters Carnival of Monsters]]": Commissioner Kalik, the xenophobic Minoran bureaucrat with political ambitions who releases the Drashigs.
** "[[Recap/DoctorWhoS10E3FrontierInSpace Frontier in Space]]": The Master, although it turns out that he's really being employed by the Daleks to start an interstellar war.
** "[[Recap/DoctorWhoS10E4PlanetOfTheDaleks Planet of the Daleks]]": The Supreme Dalek in charge of the Dalek forces.
** "[[Recap/DoctorWhoS10E5TheGreenDeath The Green Death]]": BOSS, a corporate supercomputer gone rogue.
* Season 11:
** "[[Recap/DoctorWhoS11E1TheTimeWarrior The Time Warrior]]": Sontaran Commander Linx
** "[[Recap/DoctorWhoS11E2InvasionOfTheDinosaurs Invasion of the Dinosaurs]]": Charles Grover, head of Operation: Golden Age
** "[[Recap/DoctorWhoS11E3DeathToTheDaleks Death to the Daleks]]": A BigBadEnsemble between the Daleks and the City, with the Daleks even briefly forming an EnemyMine with the Doctor.
** "[[Recap/DoctorWhoS11E4TheMonsterOfPeladon The Monster of Peladon]]": A BigBadDuumvirate between the Ice Warrior leader Azaxyr and EvilChancellor Eckersley.
** "[[Recap/DoctorWhoS11E5PlanetOfTheSpiders Planet of the Spiders]]": The Great One, ruler of the titular spiders.
* Season 12:
** "[[Recap/DoctorWhoS12E1Robot Robot]]": For most of the story, it's Hilda Winters, although the K1 Robot ends up being the Final Boss.
** "[[Recap/DoctorWhoS12E2TheArkInSpace The Ark in Space]]": The Wirrn, with Noah functioning as the swarm leader until his Heel–Face Turn.
** "[[Recap/DoctorWhoS12E3TheSontaranExperiment The Sontaran Experiment]]": Field Major Styre, with the Sontaran Marshal he reports to being the GreaterScopeVillain.
** "[[Recap/DoctorWhoS12E4GenesisOfTheDaleks Genesis of the Daleks]]": Davros, creator of the Daleks and thus the main obstacle in the Doctor's mission to stop the creation of the Daleks.
** "[[Recap/DoctorWhoS12E5RevengeOfTheCybermen Revenge of the Cybermen]]": The Cyber-Leader heading the Cybermen takeover of Nerva.
* Season 13:
** "[[Recap/DoctorWhoS13E1TerrorOfTheZygons Terror of the Zygons]]": Broton, Warlord of the Zygons.
** "[[Recap/DoctorWhoS13E2PlanetOfEvil Planet of Evil]]": The anti-matter creature.
** "[[Recap/DoctorWhoS13E3PyramidsOfMars Pyramids of Mars]]": Sutekh the Destroyer.
** "[[Recap/DoctorWhoS13E4TheAndroidInvasion The Android Invasion]]": Styrrgon, the Kraal scientist who developed a lethal virus for their invasion.
** "[[Recap/DoctorWhoS13E5TheBrainOfMorbius The Brain of Morbius]]": Morbius, who seeks to have his brain implanted in the Doctor's body.
** "[[Recap/DoctorWhoS13E6TheSeedsOfDoom The Seeds of Doom]]": Harrison Chase, although by the last episode he's basically become The Dragon for the Krynoid.
* Season 14:
** "[[Recap/DoctorWhoS14E1TheMasqueOfMandragora The Masque of Mandragora]]": The Mandragora Helix, who manipulates things to pave way for its emergence.
** "[[Recap/DoctorWhoS14E2TheHandOfFear The Hand of Fear]]": Eldrad, a Kastrian criminal punished by disintegration but who survived as a spirit.
** "[[Recap/DoctorWhoS14E3TheDeadlyAssassin The Deadly Assassin]]": The Master, the mastermind behind the assassination.
** "[[Recap/DoctorWhoS14E4TheFaceOfEvil The Face of Evil]]": Xoanon, who unusually ends up undergoing a Heel–Face Turn.
** "[[Recap/DoctorWhoS14E5TheRobotsOfDeath The Robots of Death]]": Taren Capel, the one reprogramming the robots to kill the humans.
** "[[Recap/DoctorWhoS14E6TheTalonsOfWengChiang The Talons of Weng-Chiang]]": Weng-Chiang, aka Magnus Greel, serves as the main antagonist of the story, leading Chang and the Tong of the Black Scorpion in their kidnapping of prostitutes to fuel his experiments with the Time Cabinet.
* Season 15:
** "[[Recap/DoctorWhoS15E1HorrorOfFangRock Horror of Fang Rock]]": The Rutan, who masquerades as lighthouse-keeper Reuben.
** "[[Recap/DoctorWhoS15E2TheInvisibleEnemy The Invisible Enemy]]": The Nucleus of the Swarm.
** "[[Recap/DoctorWhoS15E3ImageOfTheFendahl Image of the Fendahl]]": The titular Fendahl, a prehistoric creature that feeds off life force.
** "[[Recap/DoctorWhoS15E4TheSunMakers The Sun Makers]]": The Collector, the Company's representative on Pluto.
** "[[Recap/DoctorWhoS15E5Underworld Underworld]]": The Oracle, a haywire computer that rules over the survivors of the Minyan crew with the aid of the robotic Seers.
** "[[Recap/DoctorWhoS15E6TheInvasionOfTime The Invasion of Time]]": Commander Stor, the head of the Sontaran forces and the one manipulating the Vardans as cover for the Sontaran invasion.
* Season 16:
** "[[Recap/DoctorWhoS16E1TheRibosOperation The Ribos Operation]]": The psychopathic ex-dictator Graff Vynda-K.
** "[[Recap/DoctorWhoS16E2ThePiratePlanet The Pirate Planet]]": Initially, it seems to be the Captain, but it gets revealed in the second half to be Queen Xanxia.
** "[[Recap/DoctorWhoS16E3TheStonesOfBlood The Stones of Blood]]": Cessair of Diplos, an intergalactic professional criminal.
** "[[Recap/DoctorWhoS16E4TheAndroidsOfTara The Androids of Tara]]": Count Grendel of Gracht, an aristocrat seeking to become King of Tara.
** "[[Recap/DoctorWhoS16E5ThePowerOfKroll The Power of Kroll]]": A BigBadEnsemble of Thawn and Ranquin, the former wanting to get rid of the Swampies and the other wanting to get rid of humans, and the titular Kroll itself.
** "[[Recap/DoctorWhoS16E6TheArmageddonFactor The Armageddon Factor]]": The Black Guardian, although he spends much of the story acting through [[TheHeavy the Shadow]].
* Season 17:
** "[[Recap/DoctorWhoS17E1DestinyOfTheDaleks Destiny of the Daleks]]": Davros and the Daleks, in a BigBadEnsemble with the Movellans.
** "[[Recap/DoctorWhoS17E2CityOfDeath City of Death]]": Scaroth, last of the warlike Jagaroth.
** "[[Recap/DoctorWhoS17E3TheCreatureFromThePit The Creature From the Pit]]": Adrasta, who throws the Doctor in the Pit when he refuses to work for her.
** "[[Recap/DoctorWhoS17E4NightmareOfEden Nightmare of Eden]]": [[spoiler:Tryst, ringleader of the drug smuggling operation.]]
** "[[Recap/DoctorWhoS17E5TheHornsOfNimon The Horns of Nimon]]": The planet-devouring Nimon.
** "[[Recap/DoctorWhoS17E6Shada Shada]]": Skagra, who seeks to complete his brain jar and use it to control the universe.
* Season 18:
** "[[Recap/DoctorWhoS18E1TheLeisureHive The Leisure Hive]]": The initial problems are caused by the West Lodge Foamasi, whose leader is posing as Brock, as they sabotage the Leisure Hive in the hope of buying it up. However, the hawkish Argolin Pangol becomes more and more of a threat as he plans to lead the Argolins back into war with an army of clones, ultimately serving as the Final Boss.
** "[[Recap/DoctorWhoS18E2Meglos Meglos]]": The titular Meglos, who plans to use the Dodecahedron to power a superweapon capable of destroying entire planets.
** "[[Recap/DoctorWhoS18E3FullCircle Full Circle]]": The Marshmen, although they're mostly just acting on instinct.
** "[[Recap/DoctorWhoS18E4StateOfDecay State of Decay]]": The Great Vampire, a SealedEvilInACan whose release the Doctor is trying to prevent.
** "[[Recap/DoctorWhoS18E5WarriorsGate Warrior's Gate]]": Captain Rorvik, the head of a slave ship.
** "[[Recap/DoctorWhoS18E6TheKeeperOfTraken The Keeper of Traken]]": The Master, who orchestrated things to get himself a new body.
** "[[Recap/DoctorWhoS18E7Logopolis Logopolis]]": The Master. Although much of the destruction he causes is accidental and he ends up in an Enemy Mine with the Doctor for a while, he's quick to revert to his usual ways once he's in a position to do so.
* Season 19:
** "[[Recap/DoctorWhoS19E1Castrovalva Castrovalva]]": The plot turns out to be yet another scheme of the Master.
** "[[Recap/DoctorWhoS19E2FourToDoomsday Four to Doomsday]]": Monarch, an insane alien who believes himself god.
** "[[Recap/DoctorWhoS19E3Kinda Kinda]]": The Mara, an evil entity that feeds off destruction.
** "[[Recap/DoctorWhoS19E4TheVisitation The Visitation]]": The Terileptil Leader.
** "[[Recap/DoctorWhoS19E5BlackOrchid Black Orchid]]": [[spoiler:George Cranleigh, the estranged son of Lady Cranleigh and perpetrator of the murders.]]
** "[[Recap/DoctorWhoS19E6Earthshock Earthshock]]": The Cyber-Leader in charge of the Cybermen invasion of Earth.
** "[[Recap/DoctorWhoS19E7TimeFlight Time Flight]]": The Master, whose plot here is to obtain power for his TARDIS.
* Season 20:
** "[[Recap/DoctorWhoS20E1ArcOfInfinity Arc of Infinity]]": Omega, who is making another attempt to obtain a body for himself.
** "[[Recap/DoctorWhoS20E2Snakedance Snakedance]]": The Mara, which manages to reemerge and possess Tegan.
** "[[Recap/DoctorWhoS20E3MawdrynUndead Mawdryn Undead]]": A BigBadEnsemble between the Black Guardian, who is acting through Turlough, and Mawdryn.
** "[[Recap/DoctorWhoS20E4Terminus Terminus]]": Another BigBadEnsemble involving the Black Guardian, this time having him split it with Vanir leader Eirak.
** "[[Recap/DoctorWhoS20E5Enlightenment Enlightenment]]": The Black Guardian, now taking center stage with his revenge plot.
** "[[Recap/DoctorWhoS20E6TheKingsDemons The King's Demons]]": The Master, returning yet again to take another shot at the Doctor.
* Season 21:
** "[[Recap/DoctorWhoS21E1WarriorsOfTheDeep Warriors of the Deep]]": A BigBadEnsemble between the Silurian leader Ichtar and Senior Officer Nilson.
** "[[Recap/DoctorWhoS21E2TheAwakening The Awakening]]": The Malus, an evil time-travelling alien war machine feeding on psychic energy.
** "[[Recap/DoctorWhoS21E3Frontios Frontios]]": The Gravis their only articulate, thinking Tractator.
** "[[Recap/DoctorWhoS21E4ResurrectionOfTheDaleks Resurrection of the Daleks]]": Davros and the Supreme Dalek, leading the Imperial Daleks and Renegade Daleks in opposite sides of an EnemyCivilWar.
** "[[Recap/DoctorWhoS21E5PlanetOfFire Planet of Fire]]": The Master, who's attempting another megalomaniacal plan.
** "[[Recap/DoctorWhoS21E6TheCavesOfAndrozani The Caves of Androzani]]": Morgus is arguably the story's most irredeemable and prominent villain, but notably he never actually meets the Doctor face-to-face.
** "[[Recap/DoctorWhoS21E7TheTwinDilemma The Twin Dilemma]]: Mestor.
* Season 22:
** "[[Recap/DoctorWhoS22E1AttackOfTheCybermen Attack of the Cybermen]]": The Cyber-Controller, who's returned to lead the Cybermen once more. The Cyber-Leader acts as TheDragon to him.
** "[[Recap/DoctorWhoS22E2VengeanceOnVaros Vengeance on Varos]]": Sil, representative of the Galatron Mining Corporation.
** "[[Recap/DoctorWhoS22E3TheMarkOfTheRani The Mark of the Rani]]": A BigBadDuumvirate between the Master and the Rani.
** "[[Recap/DoctorWhoS22E4TheTwoDoctors The Two Doctors]]": Chessene, an artificially evolved Androgum working with the Sontarans.
** "[[Recap/DoctorWhoS22E5Timelash Timelash]]": The Borad, a mysterious dictator looking to provoke an interstellar war.
** "[[Recap/DoctorWhoS22E6RevelationOfTheDaleks Revelation of the Daleks]]": Davros, the one orchestrating the eugenicist cannibalization of interred corpses at Tranquil Repose in order to use the best-quality bodies to create a new race of Daleks loyal to him while turning everyone else into food.
* Season 23: The Valeyard acts as the BigBad for the season as a whole, though most serials focus on a different antagonist.
** "[[Recap/DoctorWhoS23E1TheMysteriousPlanet The Mysterious Planet]]": Drathro, ruler of the underground habitation.
** "[[Recap/DoctorWhoS23E2Mindwarp Mindwarp]]": Kiv, leader of the Mentors.
** "[[Recap/DoctorWhoS23E3TerrorOfTheVervoids Terror of the Vervoids]]": A three-way BigBadEnsemble of Doland, Rudge and the Mogarians, and the Vervoids. Four-way if you include Bruchner, who ends up going nuts and trying to kill everyone.
** "[[Recap/DoctorWhoS23E4TheUltimateFoe The Ultimate Foe]]": The Valeyard, finally taking center stage.
* Season 24:
** "[[Recap/DoctorWhoS24E1TimeAndTheRani Time and the Rani]]: The returning Rani, who's been kidnapping the smartest people throughout space and time in order to create a gigantic artificial brain
** "[[Recap/DoctorWhoS24E2ParadiseTowers Paradise Towers]]": Kroagnon, yet another SealedEvilInACan seeking to gain a new body.
** "[[Recap/DoctorWhoS24E3DeltaAndTheBannermen Delta and the Bannerman]]": Gavrok, the leader of the titular Bannermen.
** "[[Recap/DoctorWhoS24E4Dragonfire Dragonfire]]": Kane, a HumanoidAlien seeking the treasure of the dragon.
* Season 25:
** "[[Recap/DoctorWhoS25E1RemembranceOfTheDaleks Remembrance of the Daleks]]": A BigBadEnsemble between the Dalek Emperor ([[spoiler:really Davros]]), leader of the Imperial Daleks, and the Supreme Dalek, leading the Dalek Renegades against the Imperial Daleks in yet another Dalek EnemyCivilWar.
** "[[Recap/DoctorWhoS25E2TheHappinessPatrol The Happiness Patrol]]": Helen A, ruler of Terra Alpha and responsible for the enforced happiness on its population.
** "[[Recap/DoctorWhoS25E3SilverNemesis Silver Nemesis]]": A BigBadEnsemble between the Cyber Leader, Lady Peinforte and Herr De Flores, all competing against the Doctor and each other to gain the Nemesis for nefarious purposes.
** "[[Recap/DoctorWhoS25E4TheGreatestShowInTheGalaxy The Greatest Show in the Galaxy]]": The Gods of Ragnarok, whom the CircusOfFear exists to entertain.
* Season 26:
** "[[Recap/DoctorWhoS26E1Battlefield Battlefield]]": Morgaine, Battle Queen of the S'rax and Dominator of the Thirteen Worlds.
** "[[Recap/DoctorWhoS26E2GhostLight Ghost Light]]": Light. For much of the story, he's a SealedEvilInACan but becomes the Final Boss after the Doctor releases him in the hope he'll take care of Starter Villain Josiah Samuel Smith.
** "[[Recap/DoctorWhoS26E3TheCurseOfFenric The Curse of Fenric]]": The titular Fenric, who turns out to have been the BigBad the Seventh Doctor's era as a whole.
** "[[Recap/DoctorWhoS26E4Survival Survival]]": TheMaster, returning to face the Doctor one last time for the GrandFinale of the classic series.
!!Revival Series
* Series 3: Mr. Saxon, aka [[spoiler:the Master, the Doctor's most famous standalone antagonist]].
* Series 6: Madame Kovarian and the Order of the Silence. The Silence's plotting actually encompasses the entirety of the Eleventh Doctor's MythArc, but they are not formally revealed in Series 5 and are absent in Series 7, only returning in his GrandFinale ChristmasEpisode.
* Series 7B: The Great Intelligence.
* Series 8: Missy, a.k.a. [[spoiler:the Master's next, gender-bent incarnation]], who for bonus points had a hand in the events of Series 7B by [[spoiler:getting the Doctor together with Clara Oswald]].
* Series 11: [[spoiler: Tzim-Sha ultimately serves as the main threat of the opener and closer, and his actions, mostly his part in Grace's death, provide the arc of the overall series.]]
* Series 12: [[spoiler: The Master returns in a new form in the two-part series premier and finale]], though more recurring throughout the season is Ashad, a.k.a. the Lone Cyberman.
!!Classic Series
* Season 1:
** "[[Recap/DoctorWhoS1E1AnUnearthlyChild An Unearthly Child]]": Kal the Caveman, the first in a long line of Doctor Who villains and the person responsible for its first two deaths before becoming the third.
** "[[Recap/DoctorWhoS1E2TheDaleks The Daleks]]" has of course the Daleks, who would quickly become the Big Bads of the series as a whole.
** "[[Recap/DoctorWhoS1E4MarcoPolo Marco Polo]]": Tegana, who is responsible for the acts of sabotage against Marco's party, directing the bandits that harass them and attempting to assassinate the Khan. His master Noghai serves as the GreaterScopeVillain.
** "[[Recap/DoctorWhoS1E5TheKeysOfMarinus The Keys of Marinus]]": Yartek. He doesn't appear until the last episode but it is his actions that prompt the Doctor's party to go on their quest to find a way to defeat him.
** "[[Recap/DoctorWhoS1E6TheAztecs The Aztecs]]": Tlotoxl, an Aztec high priest who plots against Barbara after she's mistaken for a goddess.
** "[[Recap/DoctorWhoS1E7TheSensorites The Sensorites]]": The human Commander. His poisoning of the water supply has caused all the Sensorite deaths, leading to their hostility towards the new human ship and arguably to the City Administrator's Start of Darkness.
** "[[Recap/DoctorWhoS1E8TheReignOfTerror The Reign of Terror]]": Maximilien Robespierre, as the leader of the Revolution which causes all the Doctor and company's problems (at least until the end).
* Season 2:
** "[[Recap/DoctorWhoS2E1PlanetOfGiants Planet of Giants]]": Forester, a ruthless businessmen looking to launch a new insecticide harmful to life.
** "[[Recap/DoctorWhoS2E2TheDalekInvasionOfEarth The Dalek Invasion of Earth]]": The black Supreme Dalek in charge of the Dalek-occupied Earth, with the referenced Dalek Supreme Command as the {{Greater Scope Villain}}s.
** The "[[Recap/DoctorWhoS2E3TheRescue Rescue]]" two parter has Bennett, who set the whole Koquillion masquerade up to disguise acts of mass murder and genocide.
** "[[Recap/DoctorWhoS2E4TheRomans The Romans]]": Nero, who takes the Doctor and his companions captive shortly after their arrival in Rome.
** "[[Recap/DoctorWhoS2E5TheWebPlanet The Web Planet]]": The Animus, a being seeking to envelop Planet Vortis in webs.
** "[[Recap/DoctorWhoS2E6TheCrusade The Crusade]]": El Akir. Technically, he's a subject of Saladin, but after his failure to capture King Richard, his schemes are solely for his own gratification rather than for the sake of the Saracen cause.
** "[[Recap/DoctorWhoS2E7TheSpaceMuseum The Space Museum]]": Governor Lobos, the leader of the Morok forces on Xeros.
** "[[Recap/DoctorWhoS2E8TheChase The Chase]]": The black Supreme Dalek dispatching the assassination squad after the TARDIS crew.
** "[[Recap/DoctorWhoS2E9TheTimeMeddler The Time Meddler]]": The Meddling Monk, who plots to alter history so the English will "have jetlines by 1320."
* Season 3:
** "[[Recap/DoctorWhoS3E1Galaxy4 Galaxy 4]]": Maaga, leader of the war-like Drahvins.
** "[[Recap/DoctorWhoS3E2MissionToTheUnknown To The Unknown]]": The black Dalek heading the Dalek council and their plot.
** "[[Recap/DoctorWhoS3E3TheMythMakers The Myth Makers]]": As far as the Greek army the Doctor allies with are concerned, it's King Priam, although it's more a case of Grey-and-Gray Morality.
** "[[Recap/DoctorWhoS3E4TheDaleksMasterPlan The Daleks' Master Plan]]": The Supreme Dalek in charge of the Dalek forces on Kembel.
** "[[Recap/DoctorWhoS3E5TheMassacre The Massacre]]": Catherine de Medici.
** "[[Recap/DoctorWhoS3E6TheArk The Ark]]": Monoid One, who plans to leave all the humans behind on the Ark and then destroy it with a bomb.
** "[[Recap/DoctorWhoS3E7TheCelestialToymaker The Celestial Toymaker]]" has the titular Toymaker.
** "[[Recap/DoctorWhoS3E8TheGunfighters The Gunfighters]]": Pa Clanton is the head of the family and encourages his sons in their vendetta against Holliday and the Earps.
** "[[Recap/DoctorWhoS3E9TheSavages The Savages]]": Initially Jano. After his Heel–Face Turn, Captain Edal becomes the member of the Elders most determined to preserve the status quo.
** "[[Recap/DoctorWhoS3E10TheWarMachines The War-Machines]]": WOTAN, a power hungry and malevolent computer.
* Season 4:
** "[[Recap/DoctorWhoS4E1TheSmugglers The Smugglers]]": Captain Samuel Pike, the leader of the pirates.
** "[[Recap/DoctorWhoS4E2TheTenthPlanet The Tenth Planet]]": Gern, the Cyberman who takes over Geneva and is said to be in charge of their forces on Earth.
** "[[Recap/DoctorWhoS4E3ThePowerOfTheDaleks The Power of the Daleks]]": The Daleks. Various human schemers plot to use them to their advantage, but the Daleks eventually trump all of them.
** "[[Recap/DoctorWhoS4E4TheHighlanders The Highlanders]]": Grey, a crooked solicitor who is selling captured Highland clansmen into slavery in the West Indies.
** "[[Recap/DoctorWhoS4E5TheUnderwaterMenace The Underwater Menace]]": Professor Zaroff, a GenericDoomsdayVillain who plans to drain the ocean into the Earth's core and thereby destroy the planet.
** "[[Recap/DoctorWhoS4E6TheMoonbase The Moonbase]]": The Cybermen, at it again.
** "[[Recap/DoctorWhoS4E7TheMacraTerror The Macra Terror]]": The Macra, specifically the one known as Control.
** "[[Recap/DoctorWhoS4E8TheFacelessOnes The Faceless Ones]]": The Chameleon Director, who is co-ordinating the operation from their space station.
** "[[Recap/DoctorWhoS4E9TheEvilOfTheDaleks The Evil of the Daleks]]": The Dalek Emperor, who is also implicitly the GreaterScopeVillain for all the previous Dalek stories.
* Season 5:
** "[[Recap/DoctorWhoS5E1TheTombOfTheCybermen The Tomb of the Cybermen]]": The Cyber-Controller, supreme leader of the Cybermen.
** "[[Recap/DoctorWhoS5E2TheAbominableSnowmen The Abominable Snowmen]]": The Great Intelligence, an intangible being trying to create a form for itself in order to take over the Earth.
** "[[Recap/DoctorWhoS5E3TheIceWarriors The Ice Warriors]]": Varga, commander of the Ice Warriors plotting to take over Earth.
** "[[Recap/DoctorWhoS5E4TheEnemyOfTheWorld The Enemy of the World]]": Ramon Salamander, a DiabolicalMastermind plotting to take over the world.
** "[[Recap/DoctorWhoS5E5TheWebOfFear The Web of Fear]]": The Great Intelligence again.
** "[[Recap/DoctorWhoS5E6FuryFromTheDeep Fury From the Deep]]": The Weed Creature infesting the natural gas refinery.
** "[[Recap/DoctorWhoS5E7TheWheelInSpace The Wheel in Space]]": The Cyber-Planner, who directs the Cybermen on the Silver Carrier and the Wheel from their mother ship.
* Season 6:
** "[[Recap/DoctorWhoS6E1TheDominators The Dominators]]": Navigator Rago, the senior Dominator.
** "[[Recap/DoctorWhoS6E2TheMindRobber The Mind Robber]]": The Master Brain computer.
** "[[Recap/DoctorWhoS6E3TheInvasion The Invasion]]": Tobias Vaughn, at least until the Cybermen well and truly prove to be Eviler than Thou.
** "[[Recap/DoctorWhoS6E4TheKrotons The Krotons]]: The titular Krotons.
** "[[Recap/DoctorWhoS6E5TheSeedsOfDeath The Seed of Death]]": Slaar, the leader of the Ice Warriors who take over the moon.
** "[[Recap/DoctorWhoS6E6TheSpacePirates The Space Pirates]]": Maurice Caven, leader of the titular pirates.
** "[[Recap/DoctorWhoS6E7TheWarGames The War Games]]": The War Lord, leader of the evil aliens.
* Season 7:
** "[[Recap/DoctorWhoS7E1SpearheadFromSpace Spearhead from Space]]": The Nestene Consciousness, with Channing acting as [[The Heavy the face]] of its Autons.
** "[[Recap/DoctorWhoS7E2DoctorWhoAndTheSilurians Doctor Who and the Silurians]]": The Young Silurian. He is technically subordinate to the Old Silurian at first but has the virus intended to kill the humans released entirely on his own authority and, when he finds the Old Silurian has given the Doctor the means to find a cure, kills him and takes over.
** "[[Recap/DoctorWhoS7E3TheAmbassadorsOfDeath The Ambassador of Death]]": General Carrington, who's behind the kidnappings of the ambassadors.
** "[[Recap/DoctorWhoS7E4Inferno Inferno]]": Professor Stahlman. For the most part, he's an Unwitting Instigator of Doom, but his resorting to threats and sabotage so nothing stops "his" project are the cause of most of the problems in the story.
* Season 8: The Master acts as this for the season as a whole, although each story features him working with a different villain.
** "[[Recap/DoctorWhoS8E1TerrorOfTheAutons Terror of the Autons]]": The Nestene Consciousness again. The Master starts off working with it but later forms an EnemyMine with the Doctor against it.
** "[[Recap/DoctorWhoS8E2TheMindOfEvil The Mind of Evil]]": The Master, taking center stage in this story arc with his plot to start WorldWarIII.
** "[[Recap/DoctorWhoS8E3TheClawsOfAxos The Claws of Axos]]: Axos, who the Master starts off aligned with but eventually teams up with the Doctor against.
** "[[Recap/DoctorWhoS8E4ColonyInSpace Colony in Space]]": Captain Dent, forming a BigBadEnsemble with the Master.
** "[[Recap/DoctorWhoS8E5TheDaemons The Daemons]]": The Master, who set things off with his scheme to gain Azal's powers.
* Season 9:
** "[[Recap/DoctorWhoS9E1DayOfTheDaleks Day of the Daleks]]": The gold Supreme Dalek, who's in charge of the Dalek forces on Earth.
** "[[Recap/DoctorWhoS9E2TheCurseOfPeladon The Curse of Peladon]]": A BigBadDuumvirate of Arcturus and Hepesh.
** "[[Recap/DoctorWhoS9E3TheSeaDevils The Sea Devils]]": The Chief Sea Devil [[BigBadDuumvirate and]] the Master, until the Sea Devils betray the Master and he allies with the Doctor against them.
** "[[Recap/DoctorWhoS9E4TheMutants The Mutants]]": The Marshal, who seeks to prevent Solos from becoming independent of Earth's Empire.
** "[[Recap/DoctorWhoS9E5TheTimeMonster The Time Monster]]": The Master, who schemes to take control of Kronos.
* Season 10:
** "[[Recap/DoctorWhoS10E1TheThreeDoctors The Three Doctors]]" has the renegade Time Lord founder Omega.
** "[[Recap/DoctorWhoS10E2CarnivalOfMonsters Carnival of Monsters]]": Commissioner Kalik, the xenophobic Minoran bureaucrat with political ambitions who releases the Drashigs.
** "[[Recap/DoctorWhoS10E3FrontierInSpace Frontier in Space]]": The Master, although it turns out that he's really being employed by the Daleks to start an interstellar war.
** "[[Recap/DoctorWhoS10E4PlanetOfTheDaleks Planet of the Daleks]]": The Supreme Dalek in charge of the Dalek forces.
** "[[Recap/DoctorWhoS10E5TheGreenDeath The Green Death]]": BOSS, a corporate supercomputer gone rogue.
* Season 11:
** "[[Recap/DoctorWhoS11E1TheTimeWarrior The Time Warrior]]": Sontaran Commander Linx
** "[[Recap/DoctorWhoS11E2InvasionOfTheDinosaurs Invasion of the Dinosaurs]]": Charles Grover, head of Operation: Golden Age
** "[[Recap/DoctorWhoS11E3DeathToTheDaleks Death to the Daleks]]": A BigBadEnsemble between the Daleks and the City, with the Daleks even briefly forming an EnemyMine with the Doctor.
** "[[Recap/DoctorWhoS11E4TheMonsterOfPeladon The Monster of Peladon]]": A BigBadDuumvirate between the Ice Warrior leader Azaxyr and EvilChancellor Eckersley.
** "[[Recap/DoctorWhoS11E5PlanetOfTheSpiders Planet of the Spiders]]": The Great One, ruler of the titular spiders.
* Season 12:
** "[[Recap/DoctorWhoS12E1Robot Robot]]": For most of the story, it's Hilda Winters, although the K1 Robot ends up being the Final Boss.
** "[[Recap/DoctorWhoS12E2TheArkInSpace The Ark in Space]]": The Wirrn, with Noah functioning as the swarm leader until his Heel–Face Turn.
** "[[Recap/DoctorWhoS12E3TheSontaranExperiment The Sontaran Experiment]]": Field Major Styre, with the Sontaran Marshal he reports to being the GreaterScopeVillain.
** "[[Recap/DoctorWhoS12E4GenesisOfTheDaleks Genesis of the Daleks]]": Davros, creator of the Daleks and thus the main obstacle in the Doctor's mission to stop the creation of the Daleks.
** "[[Recap/DoctorWhoS12E5RevengeOfTheCybermen Revenge of the Cybermen]]": The Cyber-Leader heading the Cybermen takeover of Nerva.
* Season 13:
** "[[Recap/DoctorWhoS13E1TerrorOfTheZygons Terror of the Zygons]]": Broton, Warlord of the Zygons.
** "[[Recap/DoctorWhoS13E2PlanetOfEvil Planet of Evil]]": The anti-matter creature.
** "[[Recap/DoctorWhoS13E3PyramidsOfMars Pyramids of Mars]]": Sutekh the Destroyer.
** "[[Recap/DoctorWhoS13E4TheAndroidInvasion The Android Invasion]]": Styrrgon, the Kraal scientist who developed a lethal virus for their invasion.
** "[[Recap/DoctorWhoS13E5TheBrainOfMorbius The Brain of Morbius]]": Morbius, who seeks to have his brain implanted in the Doctor's body.
** "[[Recap/DoctorWhoS13E6TheSeedsOfDoom The Seeds of Doom]]": Harrison Chase, although by the last episode he's basically become The Dragon for the Krynoid.
* Season 14:
** "[[Recap/DoctorWhoS14E1TheMasqueOfMandragora The Masque of Mandragora]]": The Mandragora Helix, who manipulates things to pave way for its emergence.
** "[[Recap/DoctorWhoS14E2TheHandOfFear The Hand of Fear]]": Eldrad, a Kastrian criminal punished by disintegration but who survived as a spirit.
** "[[Recap/DoctorWhoS14E3TheDeadlyAssassin The Deadly Assassin]]": The Master, the mastermind behind the assassination.
** "[[Recap/DoctorWhoS14E4TheFaceOfEvil The Face of Evil]]": Xoanon, who unusually ends up undergoing a Heel–Face Turn.
** "[[Recap/DoctorWhoS14E5TheRobotsOfDeath The Robots of Death]]": Taren Capel, the one reprogramming the robots to kill the humans.
** "[[Recap/DoctorWhoS14E6TheTalonsOfWengChiang The Talons of Weng-Chiang]]": Weng-Chiang, aka Magnus Greel, serves as the main antagonist of the story, leading Chang and the Tong of the Black Scorpion in their kidnapping of prostitutes to fuel his experiments with the Time Cabinet.
* Season 15:
** "[[Recap/DoctorWhoS15E1HorrorOfFangRock Horror of Fang Rock]]": The Rutan, who masquerades as lighthouse-keeper Reuben.
** "[[Recap/DoctorWhoS15E2TheInvisibleEnemy The Invisible Enemy]]": The Nucleus of the Swarm.
** "[[Recap/DoctorWhoS15E3ImageOfTheFendahl Image of the Fendahl]]": The titular Fendahl, a prehistoric creature that feeds off life force.
** "[[Recap/DoctorWhoS15E4TheSunMakers The Sun Makers]]": The Collector, the Company's representative on Pluto.
** "[[Recap/DoctorWhoS15E5Underworld Underworld]]": The Oracle, a haywire computer that rules over the survivors of the Minyan crew with the aid of the robotic Seers.
** "[[Recap/DoctorWhoS15E6TheInvasionOfTime The Invasion of Time]]": Commander Stor, the head of the Sontaran forces and the one manipulating the Vardans as cover for the Sontaran invasion.
* Season 16:
** "[[Recap/DoctorWhoS16E1TheRibosOperation The Ribos Operation]]": The psychopathic ex-dictator Graff Vynda-K.
** "[[Recap/DoctorWhoS16E2ThePiratePlanet The Pirate Planet]]": Initially, it seems to be the Captain, but it gets revealed in the second half to be Queen Xanxia.
** "[[Recap/DoctorWhoS16E3TheStonesOfBlood The Stones of Blood]]": Cessair of Diplos, an intergalactic professional criminal.
** "[[Recap/DoctorWhoS16E4TheAndroidsOfTara The Androids of Tara]]": Count Grendel of Gracht, an aristocrat seeking to become King of Tara.
** "[[Recap/DoctorWhoS16E5ThePowerOfKroll The Power of Kroll]]": A BigBadEnsemble of Thawn and Ranquin, the former wanting to get rid of the Swampies and the other wanting to get rid of humans, and the titular Kroll itself.
** "[[Recap/DoctorWhoS16E6TheArmageddonFactor The Armageddon Factor]]": The Black Guardian, although he spends much of the story acting through [[TheHeavy the Shadow]].
* Season 17:
** "[[Recap/DoctorWhoS17E1DestinyOfTheDaleks Destiny of the Daleks]]": Davros and the Daleks, in a BigBadEnsemble with the Movellans.
** "[[Recap/DoctorWhoS17E2CityOfDeath City of Death]]": Scaroth, last of the warlike Jagaroth.
** "[[Recap/DoctorWhoS17E3TheCreatureFromThePit The Creature From the Pit]]": Adrasta, who throws the Doctor in the Pit when he refuses to work for her.
** "[[Recap/DoctorWhoS17E4NightmareOfEden Nightmare of Eden]]": [[spoiler:Tryst, ringleader of the drug smuggling operation.]]
** "[[Recap/DoctorWhoS17E5TheHornsOfNimon The Horns of Nimon]]": The planet-devouring Nimon.
** "[[Recap/DoctorWhoS17E6Shada Shada]]": Skagra, who seeks to complete his brain jar and use it to control the universe.
* Season 18:
** "[[Recap/DoctorWhoS18E1TheLeisureHive The Leisure Hive]]": The initial problems are caused by the West Lodge Foamasi, whose leader is posing as Brock, as they sabotage the Leisure Hive in the hope of buying it up. However, the hawkish Argolin Pangol becomes more and more of a threat as he plans to lead the Argolins back into war with an army of clones, ultimately serving as the Final Boss.
** "[[Recap/DoctorWhoS18E2Meglos Meglos]]": The titular Meglos, who plans to use the Dodecahedron to power a superweapon capable of destroying entire planets.
** "[[Recap/DoctorWhoS18E3FullCircle Full Circle]]": The Marshmen, although they're mostly just acting on instinct.
** "[[Recap/DoctorWhoS18E4StateOfDecay State of Decay]]": The Great Vampire, a SealedEvilInACan whose release the Doctor is trying to prevent.
** "[[Recap/DoctorWhoS18E5WarriorsGate Warrior's Gate]]": Captain Rorvik, the head of a slave ship.
** "[[Recap/DoctorWhoS18E6TheKeeperOfTraken The Keeper of Traken]]": The Master, who orchestrated things to get himself a new body.
** "[[Recap/DoctorWhoS18E7Logopolis Logopolis]]": The Master. Although much of the destruction he causes is accidental and he ends up in an Enemy Mine with the Doctor for a while, he's quick to revert to his usual ways once he's in a position to do so.
* Season 19:
** "[[Recap/DoctorWhoS19E1Castrovalva Castrovalva]]": The plot turns out to be yet another scheme of the Master.
** "[[Recap/DoctorWhoS19E2FourToDoomsday Four to Doomsday]]": Monarch, an insane alien who believes himself god.
** "[[Recap/DoctorWhoS19E3Kinda Kinda]]": The Mara, an evil entity that feeds off destruction.
** "[[Recap/DoctorWhoS19E4TheVisitation The Visitation]]": The Terileptil Leader.
** "[[Recap/DoctorWhoS19E5BlackOrchid Black Orchid]]": [[spoiler:George Cranleigh, the estranged son of Lady Cranleigh and perpetrator of the murders.]]
** "[[Recap/DoctorWhoS19E6Earthshock Earthshock]]": The Cyber-Leader in charge of the Cybermen invasion of Earth.
** "[[Recap/DoctorWhoS19E7TimeFlight Time Flight]]": The Master, whose plot here is to obtain power for his TARDIS.
* Season 20:
** "[[Recap/DoctorWhoS20E1ArcOfInfinity Arc of Infinity]]": Omega, who is making another attempt to obtain a body for himself.
** "[[Recap/DoctorWhoS20E2Snakedance Snakedance]]": The Mara, which manages to reemerge and possess Tegan.
** "[[Recap/DoctorWhoS20E3MawdrynUndead Mawdryn Undead]]": A BigBadEnsemble between the Black Guardian, who is acting through Turlough, and Mawdryn.
** "[[Recap/DoctorWhoS20E4Terminus Terminus]]": Another BigBadEnsemble involving the Black Guardian, this time having him split it with Vanir leader Eirak.
** "[[Recap/DoctorWhoS20E5Enlightenment Enlightenment]]": The Black Guardian, now taking center stage with his revenge plot.
** "[[Recap/DoctorWhoS20E6TheKingsDemons The King's Demons]]": The Master, returning yet again to take another shot at the Doctor.
* Season 21:
** "[[Recap/DoctorWhoS21E1WarriorsOfTheDeep Warriors of the Deep]]": A BigBadEnsemble between the Silurian leader Ichtar and Senior Officer Nilson.
** "[[Recap/DoctorWhoS21E2TheAwakening The Awakening]]": The Malus, an evil time-travelling alien war machine feeding on psychic energy.
** "[[Recap/DoctorWhoS21E3Frontios Frontios]]": The Gravis their only articulate, thinking Tractator.
** "[[Recap/DoctorWhoS21E4ResurrectionOfTheDaleks Resurrection of the Daleks]]": Davros and the Supreme Dalek, leading the Imperial Daleks and Renegade Daleks in opposite sides of an EnemyCivilWar.
** "[[Recap/DoctorWhoS21E5PlanetOfFire Planet of Fire]]": The Master, who's attempting another megalomaniacal plan.
** "[[Recap/DoctorWhoS21E6TheCavesOfAndrozani The Caves of Androzani]]": Morgus is arguably the story's most irredeemable and prominent villain, but notably he never actually meets the Doctor face-to-face.
** "[[Recap/DoctorWhoS21E7TheTwinDilemma The Twin Dilemma]]: Mestor.
* Season 22:
** "[[Recap/DoctorWhoS22E1AttackOfTheCybermen Attack of the Cybermen]]": The Cyber-Controller, who's returned to lead the Cybermen once more. The Cyber-Leader acts as TheDragon to him.
** "[[Recap/DoctorWhoS22E2VengeanceOnVaros Vengeance on Varos]]": Sil, representative of the Galatron Mining Corporation.
** "[[Recap/DoctorWhoS22E3TheMarkOfTheRani The Mark of the Rani]]": A BigBadDuumvirate between the Master and the Rani.
** "[[Recap/DoctorWhoS22E4TheTwoDoctors The Two Doctors]]": Chessene, an artificially evolved Androgum working with the Sontarans.
** "[[Recap/DoctorWhoS22E5Timelash Timelash]]": The Borad, a mysterious dictator looking to provoke an interstellar war.
** "[[Recap/DoctorWhoS22E6RevelationOfTheDaleks Revelation of the Daleks]]": Davros, the one orchestrating the eugenicist cannibalization of interred corpses at Tranquil Repose in order to use the best-quality bodies to create a new race of Daleks loyal to him while turning everyone else into food.
* Season 23: The Valeyard acts as the BigBad for the season as a whole, though most serials focus on a different antagonist.
** "[[Recap/DoctorWhoS23E1TheMysteriousPlanet The Mysterious Planet]]": Drathro, ruler of the underground habitation.
** "[[Recap/DoctorWhoS23E2Mindwarp Mindwarp]]": Kiv, leader of the Mentors.
** "[[Recap/DoctorWhoS23E3TerrorOfTheVervoids Terror of the Vervoids]]": A three-way BigBadEnsemble of Doland, Rudge and the Mogarians, and the Vervoids. Four-way if you include Bruchner, who ends up going nuts and trying to kill everyone.
** "[[Recap/DoctorWhoS23E4TheUltimateFoe The Ultimate Foe]]": The Valeyard, finally taking center stage.
* Season 24:
** "[[Recap/DoctorWhoS24E1TimeAndTheRani Time and the Rani]]: The returning Rani, who's been kidnapping the smartest people throughout space and time in order to create a gigantic artificial brain
** "[[Recap/DoctorWhoS24E2ParadiseTowers Paradise Towers]]": Kroagnon, yet another SealedEvilInACan seeking to gain a new body.
** "[[Recap/DoctorWhoS24E3DeltaAndTheBannermen Delta and the Bannerman]]": Gavrok, the leader of the titular Bannermen.
** "[[Recap/DoctorWhoS24E4Dragonfire Dragonfire]]": Kane, a HumanoidAlien seeking the treasure of the dragon.
* Season 25:
** "[[Recap/DoctorWhoS25E1RemembranceOfTheDaleks Remembrance of the Daleks]]": A BigBadEnsemble between the Dalek Emperor ([[spoiler:really Davros]]), leader of the Imperial Daleks, and the Supreme Dalek, leading the Dalek Renegades against the Imperial Daleks in yet another Dalek EnemyCivilWar.
** "[[Recap/DoctorWhoS25E2TheHappinessPatrol The Happiness Patrol]]": Helen A, ruler of Terra Alpha and responsible for the enforced happiness on its population.
** "[[Recap/DoctorWhoS25E3SilverNemesis Silver Nemesis]]": A BigBadEnsemble between the Cyber Leader, Lady Peinforte and Herr De Flores, all competing against the Doctor and each other to gain the Nemesis for nefarious purposes.
** "[[Recap/DoctorWhoS25E4TheGreatestShowInTheGalaxy The Greatest Show in the Galaxy]]": The Gods of Ragnarok, whom the CircusOfFear exists to entertain.
* Season 26:
** "[[Recap/DoctorWhoS26E1Battlefield Battlefield]]": Morgaine, Battle Queen of the S'rax and Dominator of the Thirteen Worlds.
** "[[Recap/DoctorWhoS26E2GhostLight Ghost Light]]": Light. For much of the story, he's a SealedEvilInACan but becomes the Final Boss after the Doctor releases him in the hope he'll take care of Starter Villain Josiah Samuel Smith.
** "[[Recap/DoctorWhoS26E3TheCurseOfFenric The Curse of Fenric]]": The titular Fenric, who turns out to have been the BigBad the Seventh Doctor's era as a whole.
** "[[Recap/DoctorWhoS26E4Survival Survival]]": TheMaster, returning to face the Doctor one last time for the GrandFinale of the classic series.
!!Revival Series
* Series 3: Mr. Saxon, aka [[spoiler:the Master, the Doctor's most famous standalone antagonist]].
* Series 6: Madame Kovarian and the Order of the Silence. The Silence's plotting actually encompasses the entirety of the Eleventh Doctor's MythArc, but they are not formally revealed in Series 5 and are absent in Series 7, only returning in his GrandFinale ChristmasEpisode.
* Series 7B: The Great Intelligence.
* Series 8: Missy, a.k.a. [[spoiler:the Master's next, gender-bent incarnation]], who for bonus points had a hand in the events of Series 7B by [[spoiler:getting the Doctor together with Clara Oswald]].
* Series 11: [[spoiler: Tzim-Sha ultimately serves as the main threat of the opener and closer, and his actions, mostly his part in Grace's death, provide the arc of the overall series.]]
* Series 12: [[spoiler: The Master returns in a new form in the two-part series premier and finale]], though more recurring throughout the season is Ashad, a.k.a. the Lone Cyberman.
