[5] In The War Games DVD commentary, Sherwin mentioned that he recalled hearing about the Time Lords at the beginning of the series, but as no one else remembered this, it "might have come out of [his] dreams".[16] In "Before the Flood" (2015), the Fisher King describes the Time Lords as "cowardly, vain curators, who suddenly remembered they had teeth, and became the most warlike race in the galaxy".[18] In The War Games, the Second Doctor mentions that the Time Lords' "great powers" are hardly ever used due to their policy of non-intervention into the affairs of other planets, and that they instead observe and gather knowledge.Donna's memories related to the Doctor, as well as her Time Lord knowledge, are buried in order to save her life, while the clone lives out his existence in a parallel universe with Rose Tyler.[32] During the episode "The Doctor's Wife" it is revealed that several Time Lords and their TARDISes had been trapped and destroyed by an entity called House who lived in a separate bubble universe.In "World War Three",[49] the Doctor is able to shake off an electrocution attempt which is fatal to a number of humans, and appears unaffected by the energy whip wielded by the Sycorax in "The Christmas Invasion".[42] In "Smith and Jones" the Tenth Doctor says that the radiation given off by X-rays pose no real threat to Time Lords, and proceeds to absorb an amount that would be lethal to a human, which he subsequently expels through his foot.[50] "The End of Time"[32] shows the Tenth Doctor as being capable of surviving (for a short period) a massive burst of radiation that would have killed anything else instantly.The process allows them to disguise themselves as humans physiologically and psychologically, meaning they only have one heart and are stripped of non-human powers, and of any memory of having been a Time Lord.[59] The story element is later revisited in the Series 12 episode "Fugitive of the Judoon" when a mysterious, unknown incarnation of the Doctor (played by Jo Martin), is revealed to have been hiding on Earth as a tour guide named “Ruth Clayton” using a Chameleon Arch.The Doctor later displays his telepathic communion powers in "Fear Her" [70] and in "The Shakespeare Code",[71] where by using his mind melding technique he is partially able to relieve a man of his mental illness as he traces back through his memories.In the original series episode Warriors' Gate, Romana is called a 'time-sensitive' by a marauding slaver and, though she seems to deny this, is able to interface with his spaceship in ways that only a 'time-sensitive' is supposed to be able to.In the Series 5 episode "The Big Bang" [81] the Doctor telepathically left a message in Amy Pond's head before sealing her into the Pandorica so that she would know what was happening when she woke up.[69] In The Deadly Assassin at least one of the murders was carried out with a 'staser', possibly a weapon designed to both kill and prevent regeneration (stasers are also stated to have little effect on non-living tissue).The human-Time Lord hybrid River Song in "Let's Kill Hitler" claimed she was "focusing on a dress size", but subsequently weighed herself, seeming unsure of how her new body had truly developed.[42] Also seen in "Journey's End", is the apparent ability to siphon off regeneration energy in order to cancel the effect of changing appearance; which requires them to have a "bio-matching receptacle" (in this case the Doctor's severed hand), which is usually impractical.Time Lords appear to have the ability to stay conscious for moments after events that would outright kill other lifeforms instantly, giving them the opportunity to regenerate.[106] The Doctor's granddaughter Susan first describes her home world (not named as "Gallifrey" at the time) as having bright, silver-leafed trees and a burnt orange sky at night in the serial The Sensorites (1964).[108] In "Gridlock", the Tenth Doctor echoes Susan's description of the world now named as Gallifrey and goes further by mentioning the vast mountain ranges "with fields of deep red grass, capped with snow".The Doctor Who Roleplaying Game by FASA equates the Outsiders with the "Shobogans", a group mentioned briefly in The Deadly Assassin[61] as being responsible for acts of vandalism around the Panopticon, but there is actually nothing on screen that explicitly connects the two.[113] The Sixth Doctor has also characterised the Time Lords as a stagnant and corrupt society, a state caused by ten million years of absolute power.The President and Chancellor also sit on the Time Lord High Council, akin to a legislative body, composed variously of Councillors and more senior Cardinals.[16] The crew has also repeated this statement, including Malcolm Hulke and Terrance Dicks,[127] Derrick Sherwin,[128] and Russell T Davies,[129] and "The Stolen Tardis" (1979), a spin-off comic printed in issue No.[citation needed] They also treated such ceremonial symbols as the Key and Sash of Rassilon as mere historical curiosities, being unaware of their true function.During the final hours of the Time War, the High Council of Gallifrey refer to defenses called 'Sky Trenches' which appear to be at least somewhat effective against invading Daleks and/or their ships, as seen in "The Day of the Doctor".In the serial Castrovalva,[63] the Master's TARDIS is equipped with an energy field that he uses to temporarily disable or stun several human security guards outside the vessel.When Rassilon throws the white point star into the hologram of the Earth, the diamond is able to arrive at the planet by following the Master's signal, travelling through the time-locked war to the post-war universe.[61] At some point in their history the Time Lords interacted with the civilisation of the planet Minyos, giving them advanced technology (including the ability to "regenerate" to a limited degree, by rejuvenating their bodies when they grow too old).[16] In "Spyfall" (2020), the Master reveals that he returned to Gallifrey, slaughtered the population and devastated the planet in his rage over discovering the truth about the Time Lords’ origins and the identity of the Timeless Child.The Doctor, after being shown the truth about their past, plants an explosive in the Citadel, seemingly destroying the CyberMasters and the Master while rendering Gallifrey devoid of any organic life.
The Fourth Doctor regenerates into the Fifth Doctor (from
Logopolis
, 1981).