The Doctor: But you use your powers for evil!Having been around over half a century, Doctor Who and its spinoffs have introduced several especially evil villains.
Sutekh: Evil? Your evil is my good. I am Sutekh the Destroyer. Where I tread, I leave nothing but dust and darkness...I find that good!
Sutekh: Evil? Your evil is my good. I am Sutekh the Destroyer. Where I tread, I leave nothing but dust and darkness...I find that good!
- The Great Intelligence was one of The Doctor’s vilest and most powerful recurring foes. Arrogant, extremely callous and sadistic in nature; on multiple occasions it attempted to conquer the Earth and wipe out mankind, solely to grant itself a permanent physical form. For one such plot The Great Intelligence enslaved a kindly Tibetan monk, and kept the man alive for three hundred years solely to serve it, leaving its victim with just enough freedom to be aware of this and to be tormented by the knowledge of what he had been used for. A being of pure consciousness, it casually used its powers to brainwash, possess innocent people, or harvest the souls of living beings in the pursuit of its plans.The Great Intelligence also practiced a cruel form of destruction on people: manipulating them since childhood until it throws their lives away for its own benefit. Enraged by its defeats the Great Intelligence made a final attempt to utterly break the Doctor by personally undoing every single victory he had ever won and destroying every friendship he had ever made by infecting every moment of the Doctor's lifetime, forcing him to feel this happening to him as he does so. Despite the great destruction this would cause throughout the universe and even though this would be fatal to the Great Intelligence as well, it was happy to do this purely out of spite at the Doctor foiling its selfish schemes.
- The Master is seen as the Arch-Enemy of the Doctor for a very good reason:
- The Roger Delgado incarnation is the epitome of Faux Affably Evil and was often quite helpful to the Doctor if it served his purposes. He is also a petty, spiteful, murderous megalomaniac who values nothing more than power and angering the Doctor. Indeed, he admits in "The Sea Devils" that the only reason he's helping the eponymous creatures Kill All Humans is because the Doctor is fond of humans. Afterwards, at the end of his final regeneration and at the brink of death, he values nothing more than survival. Species, planets, even whole sections of the universe; there is no limit to what he will destroy to survive. And he finally achieves this by killing and hijacking the body of Tremas, quite probably the friendliest and most helpful person the Doctor has ever met who wasn't one of his companions (and thereby forcing the Doctor to look at the face of a murdered friend every time he fights him from then on).
- The resultant Anthony Ainley incarnation lacked any sort of foresight or consideration for the consequences of his actions, and, in a way, that made him even more dangerous. His first appearance has him accidentally obliterate approximately a quarter of the entire universe and go on to cause further death and destruction almost for the sheer fun of it. This incarnation of The Master was far less reserved, murdering any in his way and treating their deaths with a cool, amused disdain. Even the extermination of countless billions was nothing more than a pebble in the Master's path.
- Davros, the creator of the Daleks, was a crippled scientist on a planet with two races locked in civil war. To win, Davros created the Daleks: powerful, murderous creatures that could feel only hate and rage for every other species. To finalize the Daleks, when his superiors were about to cancel his immoral research, Davros engineered their extinction. Davros would return many times, improving his Daleks to wipe out or subjugate all other life with himself at their head and achieved the extermination of countless life forms. When he returned in modern times, Davros unleashed them on earth, revealing a new objective: to cause a massive chain reaction with a Reality Bomb that would result in: " People and planets and stars will become dust. And the dust will become atoms and the atoms will become... nothing." Davros gleefully declared his ultimate objective to be no less than THE DESTRUCTION! OF REALITY! ITSELF! A man who has admitted he would unleash a virus to end all life solely because he could, Davros is a man who seeks power that will put him above the Gods and has remained one of the Doctor's most evil and tenacious foes.
- Koquillion from season 2's "The Rescue" is also known as Bennett. To cover up a murder he committed, he murdered the crew of a human explorer ship, before wiping out the population of the peaceful planet Dido, unintentionally leaving only two survivors. He then lies to Vicki, the only other survivor of the ship and the daughter of one of the killed crew members, that the natives killed the crew, only keeping Vicki alive to corroborate his story. To maintain the illusion he disguises himself as Koquillion, and plans to convince the authorities to destroy the planet to removing all traces of his crime once they are both rescued. Upon the TARDIS arriving, he immediately tried to murder its crew as well, pushing Barbara off a cliff and causing a cave-in that buried the Doctor and Ian alive. The Doctor showed nothing less than utter disgust at all this, declaring "you destroyed a whole planet just to save your own skin."
- The Marshal from season 9's "The Mutants" is a petty tyrant who nevertheless stands out through sheer depravity. A ruthless colonial overlord, the Marshal reigns over the planet Solos, whose natives are prematurely mutating. The Marshal hunts the poor natives for sport, gloating how pathetic, disgusting and diseased they are. Upon learning the humans are turning the planet back over to the natives, leaving him without his position of power, he arranges the murder of the only man who knows this, then personally murders his own assassin and attempts to wipe out the planet's entire population in order for it to be repopulated by human colonists with him as their ruler.
- Sutekh the Destroyer, from season 13's "Pyramids of Mars", is a sadistic monster who desires nothing less than the extermination of all that lives so that nothing could challenge him. Once the security chief of the Osirian race, Sutekh grew so paranoid he even had his own loyal people slaughtered by his monster followers, climaxing in him destroying his home planet and the majority of his species, which forced the remaining 740 Osirians to band together and seal him away. Several thousands of years later, archaeologist Marcus Scarman opened his tomb. Sutekh murdered him and took control of his body in an attempt to free himself. He also had a devoted servant cooked to death as he didn’t need him, was responsible for several innocent bystanders being strangled or crushed at the hand of his robotic servants, and finally personally tortured the Doctor before taking control of him. Upon release, Sutekh planned to use his immense powers to exterminate all that lived, declaring "all life is my enemy", knowing that nothing, not even the Time Lords, could challenge him.
- Xanxia from season 16's "The Pirate Planet" is a supposedly-dead queen of Zanak, who was so brutal and cruel that she is feared in legend long after her demise. To rejuvenate herself, she forced The Captain into transforming the entire planet into a special ship capable of jumping through space and plundering entire planets. Using this she proceed to wipe out ten entire worlds, killing untold billions, harvesting every scrap of mineral and material from them entirely so she could keep her body young, beautiful and immortal.
- John Lumic from season 28's "Rise of the Cybermen" and "The Age of Steel", the creator of the Cybermen, is a coldblooded, amoral snake of a man who was suffering from a terminal illness. To discover a path to immortality, Lumic had homeless people abducted and experimented upon to convert them into Cybermen, leaving their human brains trapped in robot bodies, forced to act to their programming. When the British Government refused to bankroll Lumic's project, he decided to overthrow it by dispatching a horde of Cybermen to liquidate any potential dissidents to his rule, intending to eventually spread them across the globe.
- Rassilon is the once-proud leader of the Time Lords. After he became twisted, Rassilon sought immortality and power at the expense of all reality and everything that lived. Rassilon was the one responsible for the Master's madness, hoping to use him as an eventual pawn. Over the course of the Time War between Time Lords and Daleks, Rassilon opted for a final solution: to wipe out all of space and time so the time Lords would remain as pure consciousness, yoked to his will because he didn't see any other way to end it. Making things worse he kills unnamed Timelord for suggesting that they allow the Doctor to wipe out Gallifray and end the Time War for the good of the rest of the universe and all that are suffering in it, because he doesn't want to die. Even in the past, Rassilon had showed a predilection for 'cleansing' lesser species and knows his actions will release a varieties of evil and demonic forces that had been locked away after the Time War without a care in the universe.
- House, the sentient Asteroid from season 32's "The Doctor's Wife," is a creature that has butchered hundreds of Time Lords unlucky enough to land on his surface and stitched their bodies into subservient playthings (also took over the mind of an Ood to act as a servant), then hijacked the TARDIS for use as a new body, leaving the Doctor behind to die on the collapsing remains of his old body - and condemning its playthings to die without his influence, to boot. House then decides to use the Doctor's companions Amy and Rory as its new toys, forcing them into the labyrinth of the TARDIS corridors, torturing the two of them with nightmarish illusions, and taunting them with its catchphrase: "Why shouldn't I just kill you now?" House is a being that operates solely according to its sadistic principles of amusement and enjoys torturing whoever is unlucky enough to fall into its grasp. Death might be certain, but House makes certain that when the end comes, its victims will wish for death.
- Mrs. Gillyflower from season 33's "The Crimson Horror" makes an attempt to wipe out all humanity so she and her 'perfect' chosen people can create a new Eden. She refuses a place for her own daughter Ada because Ada is blind and doesn't fit with Mrs. Gillyflower's version of perfection, knowing this condemns her daughter to death. The kicker to this is she blinded Ada herself by experimenting on her with deadly poison to prolong her own life, revealing her as nothing more than a nasty hypocrite and Smug Snake who was willing to let everyone on earth die so she could live out her fantasies of perfection.
- Children of Earth:
- The Ambassador is a member of a race of Starfish Aliens called the 456 who incorporate prepubescent children into their physiology, as their bodies produce hormones that act as euphoric drugs to the 456. The children are kept as perpetually-childlike human reefers, one child shown as having been rendered hairless and immobile as a result of forty years of being used as a drug by the 456. After initial negotiations under falsely benevolent pretenses in 1965, the Ambassador returns in 2009 and bargains with the British government to take ten percent of the world's children under the threat of wiping out all humanity; to prove its power, the Ambassador unleashes a lethal virus throughout the Thames House that leads to the death of almost everyone inside, including Ianto Jones. Although only one member of the 456 is ever seen, the Ambassador shows itself to be exempt from Blue and Orange Morality, and expresses callous disregard for the living beings it is harvesting. The Ambassador is reflective of Torchwood's darker nature and is one of the most disgustingly evil villains to ever come out of the Whoniverse.
- Prime Minister Brian Green calmly allows 10% of the world's children to be sold as narcotics. He orders Frobisher, the man who's been most loyal to him, to give up his own children just to make the cover story he's created realistic. This leads him to shoot his family and himself to spare them the horror. After all the horror and pain, Green's first thought is how he can blame the Americans.
- Miracle Day: Oswald Danes is a convicted child rapist and killer whose defense in court was "she should have run faster." After surviving his execution due to everyone on Earth becoming immortal, he starts playing the media for forgiveness and seems well on his way to becoming a Dark Messiah. Throughout the season, it's implied that he does have some guilt over what he did and wants to die, only to reveal that he believes that he'll be able to torture his previous victim forever in Hell. His last words are to yell out that he's coming for her and that she should start running.
- The president of the English Empire Nigel Rochester in "Jubilee" is one of the more disturbing villains in the Big Finish series, being a Dalek worshipping human in charge of a nightmarishly genocidal and xenophobic empire which attempts to emulate the Daleks in all the worst ways. He remains cheerfully upbeat and affable even when mutilating midgets to fit in his "toy Daleks" or beating his wife for speaking in contractions.
- Wendle Marr from "Nekromanteia" happens to be the most despicable and unlikable character from a cast made up entirely of despicable and unlikable characters. He starts off the play by sending a fleet of ships and their crew to their deaths, then has the gall to order the flagship's commander to die as per his company's protocol. When the guy refuses, he has his assistant prepare to destroy the guy's livelihood and the lives of his family. He later receives funds to help improve the horrid quality of life for the workers on his pet project, but decides to instead pocket the money for himself and kill all the workers once it is finished. He is so evil that even the aforementioned ship commander (who tries to rape companion Erimem) is more likable than him, with his assistant killing him and making the ship commander CEO of the company instead after his greed nearly causes the destruction of the whole universe.
- The Dalek Time Controller repeatedly proves to be one, having a cold, calm, and calculating personality that sets him aside from his Dalek underlings and being the true power in charge of the Dalek conquests and implicitly the Time War, which coupled with his sadistic attempts to break the Doctor in "To The Death" by forcing him to watch all life on earth die before killing him lead to the otherwise kindhearted and casual Doctor furiously vowing to exterminate the Daleks from creation if he ever get.