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[[File:Demat circuit Day of the Daleks.png|thumb|right|The [[Third Doctor]] holds [[The Doctor's TARDIS|his TARDIS']] dematerialisation circuit. ([[TV]]: ''[[Day of the Daleks]]'')]]
{{Infobox Object
A '''dematerialisation circuit''' was an essential part of a [[TARDIS]] which enabled it to dematerialise from normal space into the [[Time Vortex]] and rematerialise back from it. ([[TV]]: ''[[Terror of the Autons]]'') The Doctor's [[Type 40]] TARDIS used a Mark I model dematerialisation circuit, while [[the Master's TARDIS]] used a Mark II.
|image      = Demat circuit Day of the Daleks.png
|aka        =
|type        = [[TARDIS]] circuit
|made by    = [[Time Lord]]s
|used by    = [[Time Lord]]s
|first      = Terror of the Autons (TV story)
|appearances = [[Dematerialisation circuit - list of appearances|'''''see list''''']]
|clip        =
}}
A '''dematerialisation circuit''', sometimes shortened to '''demat circuit''', ([[AUDIO]]: ''[[The Beginning (audio story)|The Beginning]]'') was an essential part of a [[TARDIS]] which enabled it to dematerialise from normal space into the [[Time Vortex]] and rematerialise back from it. The Doctor's [[Type 40]] [[The Doctor's TARDIS|TARDIS]] used a Mark I model dematerialisation circuit, while [[the Master's first TARDIS]] used a Mark II. ([[TV]]: ''[[Terror of the Autons (TV story)|Terror of the Autons]]'') According to the [[Second Doctor]], overloading the circuit was supposed to be impossible, making it difficult to repair when it was damaged. ([[AUDIO]]: ''[[Daughter of the Gods (audio story)|Daughter of the Gods]]'')


The [[First Doctor]] removed the dematerialisation circuit from his TARDIS and took it with him when he and [[Susan Foreman|Susan]] went out exploring so [[Stoyn]] couldn't steal the ship and return to [[Gallifrey]]. ([[AUDIO]]: ''[[The Beginning (audio story)|The Beginning]]'')
On his first trip in the TARDIS, the [[First Doctor]] removed the circuit from his TARDIS and kept it on his person while he and [[Susan Foreman|Susan]] went out exploring, ensuring [[Stoyn]] couldn't use the ship to return to [[Gallifrey]]. ([[AUDIO]]: ''[[The Beginning (audio story)|The Beginning]]'')


During his [[exile on Earth]], the [[Time Lord]]s removed the dematerialisation codes from the [[Third Doctor]]'s mind and deactivated the dematerialisation circuit of [[the Doctor's TARDIS|his TARDIS]]. He coveted the Master's working dematerialisation circuit, and when the opportunity struck he swapped it for his own defective circuit. Although he learned he could not use the Mark II circuit with his TARDIS, the Doctor was cheered to realise the Master was now as trapped on Earth as he. ([[TV]]: ''[[Terror of the Autons]]'', ''[[The Mind of Evil]]'', [[PROSE]]: ''[[The Eight Doctors]]'') Once the Time Lords had rescinded the Doctor's exile as thanks for his defeat of the [[renegade Time Lord]] [[Omega]], they also restored his knowledge of the dematerialisation codes and provided him with a new circuit. ([[TV]]: ''[[The Three Doctors (TV story)|The Three Doctors]]'')
When the First and [[Second Doctor]]'s TARDISes [[Temporal collision|collided]], both dematerialisation circuits burned out and they became stranded on [[Urbinia]]. The First Doctor constructed a new one during his three-[[month]] stay. He gave it to the Second Doctor so the latter could use it to [[Fast return switch|avert]] the creation of their [[Alternate timeline|present timeline]] in which the [[Dalek]]s [[Harvest of Urbinia|attacked]] the [[planet]]. ([[AUDIO]]: ''[[Daughter of the Gods (audio story)|Daughter of the Gods]]'')


The [[Third Doctor]] took a part of his dematerialisation circuit with him when he took the Brigadier's godson [[Albert (Walls of Confinement)|Albert]] to a [[London]] [[zoo]]. The young boy stole it from the Doctor's pocket and used it to [[teleport|transport]] himself into the [[animal]] pens, but when he entered the [[tiger]]'s cage, it caught his [[hand]] in its [[mouth]]. The Doctor entered the cage, then instructed Albert how to use the circuit to free himself. ([[AUDIO]]: ''[[Walls of Confinement]]'')
During his [[exile on Earth]], the [[Time Lord]]s removed the dematerialisation codes from the [[Third Doctor]]'s mind and deactivated the dematerialisation circuit of [[the Doctor's TARDIS|his TARDIS]]. He coveted the Master's working dematerialisation circuit, and when the opportunity struck he swapped it for his own defective circuit. Although he learned he could not use the Mark II circuit with his TARDIS, the Doctor was cheered to realise that the Master was now as trapped on Earth as he. ([[TV]]: ''[[Terror of the Autons (TV story)|Terror of the Autons]]'', [[PROSE]]: ''[[The Eight Doctors (novel)|The Eight Doctors]]'')


[[Dalek]] [[time travel]] devices also contained mini-dematerialisation circuits. ([[TV]]: ''[[Day of the Daleks]]'')
However, the Doctor lost the Master's dematerialisation circuit following the destruction of the [[Keller Machine]]. Shortly afterwards, the Doctor received a [[telephone]] call from the Master, who had his dematerialisation circuit back and was now free to leave Earth once more, while the Doctor had to remain in exile. ([[TV]]: ''[[The Mind of Evil (TV story)|The Mind of Evil]]'')
 
Once the Time Lords had rescinded the Doctor's exile as thanks for his defeat of the [[renegade Time Lord]] [[Omega]], they also restored his knowledge of the dematerialisation codes and provided him with a new circuit. ([[TV]]: ''[[The Three Doctors (TV story)|The Three Doctors]]'')
 
The [[Third Doctor]] took a part of his dematerialisation circuit with him when he took the Brigadier's godson [[Albert (Walls of Confinement)|Albert]] to a [[London]] [[zoo]]. The young boy stole it from the Doctor's pocket and used it to [[teleport|transport]] himself into the [[animal]] pens, but when he entered the [[tiger]]'s cage, it caught his [[hand]] in its [[mouth]]. The Doctor entered the cage, then instructed Albert how to use the circuit to free himself. ([[AUDIO]]: ''[[Walls of Confinement (audio story)|Walls of Confinement]]'')
 
[[Dalek]] [[time travel]] devices also contained mini-dematerialisation circuits. ([[TV]]: ''[[Day of the Daleks (TV story)|Day of the Daleks]]'')
 
When [[TARDIS (Prisoners of Fate)|the Doctor's first TARDIS]] escaped Gallifrey and crash-landed on [[Valderon (planet)|Valderon]], its dematerialisation circuit was one of many circuits destroyed in the attempt. The [[Type 50]] stole the Doctor's Type 40's dematerialisation circuit as a temporary replacement, instantly condemning it for being unreliable and almost burnt out. The dematerialisation circuit was later returned when the Type 50 was dying. ([[AUDIO]]: ''[[Prisoners of Fate (audio story)|Prisoners of Fate]]'')
 
During the [[Last Great Time War]], the [[Time Lord]]s deduced that the [[Dalek]]s had derived their [[time technology]] from their own and so their [[technical division]] postulated that it may be possible to retroactively insert a "[[Trojan Horse]]" program into dematerialisation circuits at a [[time period]] prior to the Daleks' acquisition of the technology, thus giving the Time Lords a shut-down option that would deprive the Daleks of [[time travel]] capability. Whilst the [[War Council]] agreed that it would be an effective defense, the possibility was recognised that the Daleks could discover such a program and potentially use it against the Time Lords. A [[subcommittee]] looked into the ramifications of this course of action and was to report back once its findings had been analysed. ([[PROSE]]: ''[[Dalek Combat Training Manual (reference book)|Dalek Combat Training Manual]]'')
 
The dematerialisation circuit of [[The Master's TARDIS (Death in Heaven)|the Master's TARDIS]] was destroyed as a result of {{Simm}}'s attempt to escape a [[Mondasian]] [[Colony ship (World Enough and Time)|colony ship]] which was being pulled into a [[black hole]]. Ultimately, the Master would come across his future incarnation, [[Missy]], who provided him with a spare dematerialisation circuit which she had remembered to keep on hand as a result of their encounter. ([[TV]]: ''[[The Doctor Falls (TV story)|The Doctor Falls]]'')
[[es:Circuito de desmaterialización]]
[[ru:Дематериализационная схема]]


[[Category:TARDIS circuits]]
[[Category:TARDIS circuits]]
[[Category:Space-time]]
[[Category:Space-time]]
[[Category:Stolen technology]]
[[Category:Property stolen by the Doctor]]

Latest revision as of 19:26, 3 November 2024

A dematerialisation circuit, sometimes shortened to demat circuit, (AUDIO: The Beginning) was an essential part of a TARDIS which enabled it to dematerialise from normal space into the Time Vortex and rematerialise back from it. The Doctor's Type 40 TARDIS used a Mark I model dematerialisation circuit, while the Master's first TARDIS used a Mark II. (TV: Terror of the Autons) According to the Second Doctor, overloading the circuit was supposed to be impossible, making it difficult to repair when it was damaged. (AUDIO: Daughter of the Gods)

On his first trip in the TARDIS, the First Doctor removed the circuit from his TARDIS and kept it on his person while he and Susan went out exploring, ensuring Stoyn couldn't use the ship to return to Gallifrey. (AUDIO: The Beginning)

When the First and Second Doctor's TARDISes collided, both dematerialisation circuits burned out and they became stranded on Urbinia. The First Doctor constructed a new one during his three-month stay. He gave it to the Second Doctor so the latter could use it to avert the creation of their present timeline in which the Daleks attacked the planet. (AUDIO: Daughter of the Gods)

During his exile on Earth, the Time Lords removed the dematerialisation codes from the Third Doctor's mind and deactivated the dematerialisation circuit of his TARDIS. He coveted the Master's working dematerialisation circuit, and when the opportunity struck he swapped it for his own defective circuit. Although he learned he could not use the Mark II circuit with his TARDIS, the Doctor was cheered to realise that the Master was now as trapped on Earth as he. (TV: Terror of the Autons, PROSE: The Eight Doctors)

However, the Doctor lost the Master's dematerialisation circuit following the destruction of the Keller Machine. Shortly afterwards, the Doctor received a telephone call from the Master, who had his dematerialisation circuit back and was now free to leave Earth once more, while the Doctor had to remain in exile. (TV: The Mind of Evil)

Once the Time Lords had rescinded the Doctor's exile as thanks for his defeat of the renegade Time Lord Omega, they also restored his knowledge of the dematerialisation codes and provided him with a new circuit. (TV: The Three Doctors)

The Third Doctor took a part of his dematerialisation circuit with him when he took the Brigadier's godson Albert to a London zoo. The young boy stole it from the Doctor's pocket and used it to transport himself into the animal pens, but when he entered the tiger's cage, it caught his hand in its mouth. The Doctor entered the cage, then instructed Albert how to use the circuit to free himself. (AUDIO: Walls of Confinement)

Dalek time travel devices also contained mini-dematerialisation circuits. (TV: Day of the Daleks)

When the Doctor's first TARDIS escaped Gallifrey and crash-landed on Valderon, its dematerialisation circuit was one of many circuits destroyed in the attempt. The Type 50 stole the Doctor's Type 40's dematerialisation circuit as a temporary replacement, instantly condemning it for being unreliable and almost burnt out. The dematerialisation circuit was later returned when the Type 50 was dying. (AUDIO: Prisoners of Fate)

During the Last Great Time War, the Time Lords deduced that the Daleks had derived their time technology from their own and so their technical division postulated that it may be possible to retroactively insert a "Trojan Horse" program into dematerialisation circuits at a time period prior to the Daleks' acquisition of the technology, thus giving the Time Lords a shut-down option that would deprive the Daleks of time travel capability. Whilst the War Council agreed that it would be an effective defense, the possibility was recognised that the Daleks could discover such a program and potentially use it against the Time Lords. A subcommittee looked into the ramifications of this course of action and was to report back once its findings had been analysed. (PROSE: Dalek Combat Training Manual)

The dematerialisation circuit of the Master's TARDIS was destroyed as a result of the Saxon Master's attempt to escape a Mondasian colony ship which was being pulled into a black hole. Ultimately, the Master would come across his future incarnation, Missy, who provided him with a spare dematerialisation circuit which she had remembered to keep on hand as a result of their encounter. (TV: The Doctor Falls)