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Hypnosis or mind control was the ability to place others into a state in which that they would obey the commands of the hypnotist or believe what the hypnotist told them. Some forms of hypnosis were stronger than others. Memory erasure or alteration also could be accomplished hypnotically.
The Doctor and hypnosis
The Doctor occasionally practised hypnosis. He most commonly did this through eye-fixation. On Necros he tired to perform this form of hypnosis on a mutated victim of Davros' experiments. It failed and he was forced to fight the creature off. (DW: Revelation of the Daleks)
The Master and hypnosis
As a means to his ends, the Master frequently used hypnosis to have people perform tasks on his behalf. He most commonly did this through suggestion, uttering the phrase "I am the Master and you will obey me". (DW: Terror of the Autons) He hypnotised the Earth on a large scale through use of the Archangel Network, subtly changing people perception of him. (DW: The Sound of Drums)
Other instances of hypnosis
Professor Brett was hypnotised by WOTAN, his own creation, into aiding the robot bid to take over Earth. Other factory workers were also hypnotised into producing the War Machines. (DW: The War Machines)
On Marinus, the Morpho hypnotised the humanoids there into taking them as their rulers. (DW: The Keys of Marinus)
The Weed Creature controlled both Mr. Oak and Mr. Quill through hypnosis. They also recieved the ability to exhale toxic gas. Both of them were freed with the death of the Weed Creature. (DW: Fury from the Deep)
The workers of a gas mining colony were hypnotised by the Macra into gathering them the resources they required. (DW: The Macra Terror)
A Tythonian could use its communicator to hypnotise individuals. Torvin and Edu were hypnotised into returning Erato's communicator to him. (DW: The Creature from the Pit)
The Eight Legs performed hypnosis on a host by attaching themselves to the back. From this position, the ycould govern the host. (DW: Planet of the Spiders) The Alzarian spiders could hypnotise through a venomous bite. One did so to Romana who subsequently aided the Marshmen in their attack on the Alzarian starliner. (DW: Full Circle)
The Sontarans made use of hypnosis. Jingo Linx had several humans work for him under hypnotic influence. (DW: The Time Warrior)
Magnus Greel granted Li H'sen Chang the power of hypnosis, among others, in return for his services. (DW: The Talons of Weng-Chiang)
The King Vampire was able to hypnotise the Three Who Rule into 1000 years of service and in turn gave them the power of hypnosis. They used this upon Romana, placing her in a trance-like state of near death. (DW: State of Decay)
The Mara could hypnotise individuals by possessing them in their sleep. It did so to Tegan Jovanka before it was eventually banished from her. (DW: Kinda, Snakedance)
An passengers of the aeroplane Golf Victor Foxtrot were hypnotised by the Xeraphin after travelling through a time corridor to the Jurassic era. (DW: Time-Flight)
George Hutchinson was hypnotised by the Malus into helping create conflict in the area. The Malus fed on the psychic energy created through this. (DW: The Awakening)
A group of Sycorax who attempted to take humans as slaves used blood control to hypnotise all those with A+ blood. The Sycorax threatened to have them commit suicide if their demands were not met, but the Tenth Doctor pointed out that survival instincts would stop them from doing so. He subsequently released them by disabling the control. (DW: The Christmas Invasion)
Known Hypnotists
- The Master (DW: Terror of the Autons, the Mind of Evil, The Claws of Axos, The Daemons, The Sea Devils, The Time Monster, Mark of the Rani, The Sound of Drums, Last of the Time Lords)
- The Doctor (DW: The War Machines, Terror of the Zygons, The Talons of Weng-Chiang, Revelation of the Daleks, Silver Nemesis, Battlefield)
- The Rani, with a creature she created (DW: The Mark of the Rani)
- Borusa, with the Coronet of Rassilon (DW: The Five Doctors)
- Morpho (DW: The Keys of Marinus)
- Sensorites (DW: The Sensorites)
- Animus (DW: The Web Planet)
- Celestial Toymaker (DW: The Celestial Toymaker)
- Elders (DW: The Savages)
- Great Intelligence
- Weed Creature (DW: Fury from the Deep)
- Master Brain (DW: The Mind Robber)
- Eight Legs (DW: Planet of the Spiders)
- Sutekh (DW: Pyramids of Mars)
- Mandragora Helix (DW: The Masque of Mandragora)
- Eldrad (DW: The Hand of Fear)
- Xoanon (DW: The Face of Evil)
- Alzarian spider, through venom (DW: Full Circle)
- The Swarm (DW: The Invisible Enemy)
- Fendahl (DW: Image of the Fendahl)
- The Shadow (DW: The Armageddon Factor)
- Great Vampire and the Three Who Rule (DW: State of Decay)
- Mara
- Xeraphin (DW: Time-Flight)
- Eternals (DW: Enlightenment)
- Malus (DW: The Awakening)
- Mestor (DW: The Twin Dilemma)
- Gods of Ragnarok (DW: The Greatest Show in the Galaxy)
- Morgaine (DW: Battlefield)
- Fenric (DW: The Curse of Fenric)
- Daleks, using technology
- Cybermen, using technology
- WOTAN (DW: The War Machines)
- Zor (Doctor Who and the Pescatons)
- Macra (DW: The Macra Terror)
- Chameleons, using technology (DW: The Faceless Ones)
- War Lords, using technology (DW: The War Games)
- Nestene
- BOSS (DW: The Green Death)
- Skagra (DW: Shada)
- Terileptils, using technology (DW: The Visitation)
- Tythonians, using technology (DW: The Creature from the Pit)
- Sontarans, using technology (DW: The Time Warrior, The Sontaran Stratagem)
- Li H'sen Chang (DW: The Talons of Weng-Chiang)
- Omega (DW: Arc of Infinity)
- Sycorax, using technology (DW: The Christmas Invasion)
- The Mentor (DWM: Death to the Doctor!)
- Martin Trueman (SJA: Secrets of the Stars)