History Trivia / DoctorWhoS18E6TheKeeperOfTraken

** Johnny Byrne's original script was a conflict between the Greys and Blacks, led by Hellas and Zorca, respectively. Zorca summons a creature called Mogen, who turns out to be the last of a race of psychic empaths. Mogen wants to use Traken's power source to take over the galaxy. Zorca also frames Adric for murder which would have lend into a cliffhanger where the Doctor, Adric and Hellas are about to be executed.

** Johnny Byrne's original outline was set in a mediaeval-type society, divided between the scientific Greys and the zealous Blacks, led by Hellas and Zorca, respectively. Zorca summons a being called Mogen he believes is a demon, but whom the Doctor later realises is the last survivor of a race of super-beings with fantastic mental abilities. Mogen wants to take control of the powerful Source in order to use Traken as the launching pad for galactic conquest. Zorca frames Adric for murder, and the cliffhanger for Episode 2 originally involved the Doctor, Adric and Hellas on the brink of execution, about to be crushed between blocks of steel. A key element of part four was a stolen component from the TARDIS, which Mogen uses to construct a time disintegrator with which he plans to kill the Doctor.

* InMemoriam: The DVD adds one for Creator/AnthonyAinley after the credits of part 4.

** Johnny Byrne's original outline was set in a mediaeval-type society, divided between the scientific Greys and the zealous Blacks, led by Hellas and Zorca, respectively. Zorca summons a being called Mogen he believes is a demon, but whom the Doctor later realises is the last survivor of a race of super-beings with fantastic mental abilities. Mogen wants to take control of the powerful Source in order to use Traken as the launching pad for galactic conquest. Zorca frames Adric for murder, and the cliffhanger for episode two originally involved the Doctor, Adric and Hellas on the brink of execution, about to be crushed between blocks of steel. A key element of part four was a stolen component from the TARDIS, which Mogen uses to construct a time disintegrator with which he plans to kill the Doctor.

* TheOtherDarrin: A twofer here: Geoffery Beevers takes over the role of the decaying Master, who had previously been portrayed by Peter Pratt in "[[Recap/DoctorWhoS14E3TheDeadlyAssassin The Deadly Assassin]]". However, Pratt himself had taken over the role from Roger Delgado (who last appeared as the Master in "[[Recap/DoctorWhoS10E3FrontierInSpace Frontier in Space]]") due to the latter's death earlier in the decade; rather than pulling the usual [[TheNthDoctor regeneration]] card, Pratt's Master was written to be the exact same incarnation as Delgado's, but with an inhumanly severe bout of what is either gangrene or sixth-degree burns DependingOnTheWriter. Thus, Beevers ends up taking over the role of the Thirteenth Master from someone who had already taken over the role from someone who was already dead.

* TheOtherDarrin: A twofer here: Geoffery Beevers takes over the role of the decaying Master, having previously been portrayed by Peter Pratt in "[[Recap/DoctorWhoS14E3TheDeadlyAssassin The Deadly Assassin]]". However, Pratt himself had taken over the role from Roger Delgado (who last appeared as the Master in "[[Recap/DoctorWhoS10E3FrontierInSpace Frontier in Space]]") due to the latter's death earlier in the decade; rather than pulling the usual [[TheNthDoctor regeneration]] card, Pratt's Master was written to be the exact same incarnation as Delgado's, but with an inhumanly severe bout of what is either gangrene or sixth-degree burns DependingOnTheWriter. Thus, Beevers ends up taking over the role of the Thirteenth Master from someone who had already taken over the role from someone who was already dead.

** Creator/JudiDench, Creator/JoannaLumley, Creator/HelenMirren and Creator/DianaRigg were considered for Kassia.

* PropRecycling: The hooded robe and mask worn by Geoffrey Beevers as the disfigured Master were those as worn by Peter Pratt in "[[Recap/DoctorWhoS14E3TheDeadlyAssassin The Deadly Assassin]]". However, on this occasion the false eyes and mouth were removed from the mask to allow Beevers to give the character more facial expression.

* TheOtherDarren: A twofer here: Geoffery Beevers takes over the role of the decaying Master, having previously been portrayed by Peter Pratt in "[[Recap/DoctorWhoS14E3TheDeadlyAssassin The Deadly Assassin]]". However, Pratt himself had taken over the role from Roger Delgado (who last appeared as the Master in "[[ecap/DoctorWhoS10E3FrontierInSpace Frontier in Space]]") due to the latter's death earlier in the decade; rather than pulling the usual [[TheNthDoctor regeneration]] card, Pratt's Master was written to be the exact same incarnation as Delgado's, but with an inhumanly severe bout of what is either gangrene or sixth-degree burns DependingOnTheWriter. Thus, Beevers ends up taking over the role of the Thirteenth Master from someone who had already taken over the role from someone who was already dead.

** Margot Van der Burgh (Katura)previously appeared as [[Recap/DoctorWhoS1E6TheAztecs Cameca]].
** John Woodnutt (Seron) also appeared in [[Recap/DoctorWhoS7E1SpearheadFromSpace Spearhead from Space]], [[Recap/DoctorWhoS10E3FrontierInSpace Frontier in Space]] and as Commander Broton in [[Recap/DoctorWhoS13E1TerrorOfTheZygons Terror of the Zygons]].

* InMemoriam: The DVD adds one for Anthony Ainley after the credits of part 4.

** Creator/JudiDench, Creator/GlendaJackson, Creator/JoannaLumley, Creator/HelenMirren and Creator/DianaRigg were considered for Kassia.

* YouLookFamiliar: Denis Carey, who plays the Keeper, also played Professor Chronotis in [[Recap/DoctorWhoS17E6Shada Shada]].
** Margot Van der Burgh (Katura)previously appeared as Cameca in [[Recap/DoctorWhoS1E6TheAztecs The Aztecs]].

* WhatCouldHaveBeen: Creator/JudiDench, Creator/GlendaJackson, Creator/JoannaLumley, Creator/HelenMirren and Creator/DianaRigg were considered for Kassia.