History Trivia / DoctorWhoS11E5PlanetOfTheSpiders

** Creator/BarryLetts remarked in the DVDCommentary that, in the scene where Clegg holds the sonic screwdriver and the images appear on the IRIS machine, he had originally considered using footage from "[[Recap/DoctorWhoS10E5TheGreenDeath The Green Death]]" but he ultimately decided to use the Drashigs from "[[Recap/DoctorWhoS10E2CarnivalOfMonsters Carnival of Monsters]]" as he believed they would be more scary.

*** Christopher Burgess (Barnes) had previously played [[Recap/DoctorWhoS5E4TheEnemyOfTheWorld Swann]] and [[Recap/DoctorWhoS8E1TerrorOfTheAutons Professor George Philips]].

* CreatorBacklash: Robert Sloman wasn't very happy with this story, claiming he was "cleaned out" of ideas. This would be his last script for the programme.

* YouLookFamiliar: This serial has an unusually high number of instances because, as it was Pertwee's last, they deliberately chose actors he'd worked with before so he would be more comfortable and have a better time.
** Professor Clegg is the third nervous scientist played in the series by Creator/CyrilShaps, after [[Recap/DoctorWhoS5E1TheTombOfTheCybermen Viner]] and [[Recap/DoctorWhoS7E3TheAmbassadorsOfDeath Lennox]].
** Kevin Lindsay (Cho-Je) had previously played [[Recap/DoctorWhoS11E1TheTimeWarrior Linx]].
** Christopher Burgess (Barnes) had previously played [[Recap/DoctorWhoS5E4TheEnemyOfTheWorld Swann]] and [[Recap/DoctorWhoS8E1TerrorOfTheAutons Professor George Philips]].
** Terence Lodge (Moss) had previously played [[Recap/DoctorWhoS4E7TheMacraTerror Medok]] and [[Recap/DoctorWhoS10E2CarnivalOfMonsters Orum]].
** Andrew Staines (Keaver) previously played [[Recap/DoctorWhoS5E4TheEnemyOfTheWorld the Sergeant to Benik]], [[Recap/DoctorWhoS8E1TerrorOfTheAutons Goodge]] and [[Recap/DoctorWhoS10E2CarnivalOfMonsters the Captain of the SS]] ''[[Recap/DoctorWhoS10E2CarnivalOfMonsters Bernice]]''.
** George Cormack (K'anpo Rimpoche) had previously played [[Recap/DoctorWhoS9E5TheTimeMonster Dalios]].
* YouSoundFamiliar:
** John Dearth (Lupton) was previously the voice of [[Recap/DoctorWhoS10E5TheGreenDeath the BOSS]].
** Amongst the spider voices is Ysanne Churchman, who had previously voiced Alpha Centauri in the two [[Recap/DoctorWhoS9E2TheCurseOfPeladon Peladon]] [[Recap/DoctorWhoS11E4TheMonsterOfPeladon stories]].

** Professor Clegg is the third nervous scientist played in the series by Cyril Shaps, after [[Recap/DoctorWhoS5E1TheTombOfTheCybermen Viner]] and [[Recap/DoctorWhoS7E3TheAmbassadorsOfDeath Lennox]].

** This story was created as a last-minute replacement for "The Final Game", a story that would've written out the Master by having him pull a HeroicSacrifice to save the Doctor. Said story would've revealed that the Master is, depending on the source, either the Doctor's brother (which [[Recap/DoctorWhoS29E12TheSoundOfDrums "The Sound of Drums"]] later deconfirmed) or an amalgamation of his dark side (which was reused for the Valeyard in [[Recap/DoctorWhoS23E4TheUltimateFoe "The Ultimate Foe"]]). The script was thrown out after Creator/RogerDelgado died in a car accident while shooting an episode of the French miniseries ''The Bell of Tibet'', and this was written in its place.

* WhatCouldHaveBeen: Creator/BarryLetts remarked in the DVDCommentary that, in the scene where Clegg holds the sonic screwdriver and the images appear on the IRIS machine, he had originally considered using footage from "[[Recap/DoctorWhoS10E5TheGreenDeath The Green Death]]" but he ultimately decided to use the Drashigs from "[[Recap/DoctorWhoS10E2CarnivalOfMonsters Carnival of Monsters]]" as he believed they would be more scary.

* CreatorBacklash: Robert Sloman wasn't very happy with this story, claiming he was "cleaned out" of ideas.

* YouLookFamiliar:

** Amongst the spider voices is Ysanne Churchman, who had previously voiced Alpha Centauri.

* WhatCouldHaveBeen: Barry Letts remarked in the DVDCommentary that, in the scene where Clegg holds the sonic screwdriver and the images appear on the IRIS machine, he had originally considered using footage from "[[Recap/DoctorWhoS10E5TheGreenDeath The Green Death]]" but he ultimately decided to use the Drashigs from "[[Recap/DoctorWhoS10E2CarnivalOfMonsters Carnival of Monsters]]" as he believed they would be more scary.

* WagTheDirector: By Proxy: The massive (and completely gratuitous) car chase that takes up most of the second episode was the writers' farewell gift to Creator/JonPertwee, who appreciated any excuse to drive motor vehicles very fast.

** Andrew Staines (Keaver) previously played [[Recap/DoctorWhoS5E4TheEnemyOfTheWorld the Sergeant to Benik]], [[Recap/DoctorWhoS8E1TerrorOfTheAutons Goodge]] and [[Recap/DoctorWhoS10E2CarnivalOfMonsters the Captain of the SS ''Bernice'']].

** Amongst the spider voices is Ysanne Churchman, who had previously voiced Alpha Centari.

** Lupton was previously the voice of [[Recap/DoctorWhoS10E5TheGreenDeath the BOSS]].

** And a case of You Sound Familiar: Lupton was previously the voice of [[Recap/DoctorWhoS10E5TheGreenDeath the BOSS]].

* WagTheDirector: By Proxy: The massive (and completely gratuitous) car chase that takes up most of the second episode was the writers' farewell gift to Jon Pertwee, who appreciated any excuse to drive motor vehicles very fast.