Editing Dimensions in Time (section)

==Production==

===Cast notes===
*This was the final official appearance of [[Jon Pertwee]] as the [[Third Doctor]]; Pertwee died three years later. 
*[[Tom Baker]] returned to the role of the [[Fourth Doctor]] on television for the first time since leaving 12 years previously, though he had recorded links for the video release of the incomplete ''[[Shada (Doctor Who)|Shada]]'' the year before. Baker would later return to the series in 2013's "[[The Day of the Doctor]]" in which he appears as "The Curator".
*This special marks the first time that [[Peter Davison]] returned as the [[Fifth Doctor]]. He would later reprise the role in the 2007 mini-episode broadcast for Children in Need, "[[Time Crash]]", alongside his future son-in-law [[David Tennant]] as the [[Tenth Doctor]]; in 2022 as a "Guardian of the Edge" in "[[The Power of the Doctor]]"; and in 2023 in "[[Tales of the TARDIS]]" alongside Janet Fielding as Tegan.<ref>''The Power of the Doctor'', 2022</ref>
*This was the final appearance of [[Colin Baker]] as the [[Sixth Doctor]] until 2022, when he appeared as a “Guardian of the Edge” to the [[Thirteenth Doctor]] alongside the First, Fifth, Seventh and Eighth Doctors, and in 2023 in "[[Tales of the TARDIS]]" alongside [[Nicola Bryant]] as [[Peri Brown]].  
*This is the last appearance on television of [[Caroline John]] as [[Liz Shaw]] (John died in 2012) and [[Deborah Watling]] as [[Victoria Waterfield]] (Watling died in 2017).
*In February 1993, [[Sophie Aldred]] had guest-starred in a two-episode arc on ''EastEnders'' as Suzi.<ref>''EastEnders'' episodes dated 2 February 1993 and 4 February 1993</ref> She appears in ''Dimensions in Time'' as [[Ace (Doctor Who)|Ace]], her character from ''Doctor Who'' and the final [[Companion (Doctor Who)|companion]] of the classic era. The character would not appear on television again until 2022 in "The Power of the Doctor" as the Thirteenth Doctor's companion alongside former companion Tegan, although Ace would appear in a [[YouTube]] video on the official ''Doctor Who'' YouTube channel made to promote the [[Blu-ray]] re-release of [[Doctor Who (season 26)|Season 26]]. Aldred later reprised her role as Ace in Tales of the TARDIS in 2023 alongside Sylvester McCoy as the Doctor.
*This marked the only time that [[Brigadier Lethbridge-Stewart|the Brigadier]] appeared with the [[Sixth Doctor]] on-screen; they also met in the [[Big Finish Productions|Big Finish]] audio drama "[[The Spectre of Lanyon Moor]]".
*This marked the second time [[Carole Ann Ford]] returned as [[Susan Forman]]. The first was ten years previously in twentieth anniversary special ''[[The Five Doctors]]''. It was Ford's last onscreen appearance as Susan until she reprised the role thirty two years later in 2025 episode [[The Interstellar Song Contest]].
*This marks the most recent on-screen appearances of [[Sarah Sutton]] as [[Nyssa of Traken|Nyssa]], [[Lalla Ward]] as [[Romana (Doctor Who)|Romana]] and [[Louise Jameson]] as [[Leela (Doctor Who)|Leela]].
*This marked the final appearance of [[Kate O'Mara]] as [[The Rani]]. O'Mara died in 2014.
*[[Samuel West]] would later play the renegade Time Lord ''[[The Brain of Morbius|Morbius]]'' in the [[Big Finish Productions|Big Finish]] audio drama "[[Vengeance of Morbius|The Vengeance of Morbius]]"
*''The Dimensions of Time'' and ''3-Dimensions of Time'' were the working titles for this story.{{citation needed|date=December 2018}} David Roden convinced producer John Nathan-Turner not to use either title, and instead settled on ''Dimensions in Time''. 
*This was David Roden's first professional script. Roden's original draft featured the Seventh Doctor meeting the Brigadier on route to a UNIT reunion – and becoming involved in a battle with a crashed spacecraft full of Cybermen. The script was entitled ''Destination: Holocaust'', and featured the Seventh Doctor and Brigadier trapped in a burning church, trying to fight off the advancing damaged Cybermen. This original idea, written by David Roden, was vetoed by Nathan-Turner after it became apparent that Children in Need wished for the story to be a crossover with ''EastEnders''. Despite loving the originally proposed script, Nathan-Turner also had concerns about the cost, which would have included several lengthy night-shoots and a much larger special effects budget.
* Allegedly, [[Anthony Ainley]] was approached by Nathan-Turner to play the part of the Master in this story, but he turned it down. Ainley, however, denied this, insisting that if he were asked, he would have had no hesitation in appearing. [[Michael Gough]] was later approached to reprise the role of the [[Celestial Toymaker]], and again Nathan-Turner was turned down. Finally, Kate O'Mara was asked if she would like to reprise her role of the Rani – a request to which she agreed. O'Mara was joined by [[Samuel West]], who played her companion [[Cyrian (Doctor Who)|Cyrian]] (named after the original intended actor, Sir [[Ian McKellen]]).
*The special was one of several special [[3D television|3D]] programmes the BBC produced at the time, using a 3D system developed by American inventor Terry D. Beard that made use of the [[Pulfrich effect]]. The technology required spectacles with one darkened lens and one transparent one; these were sold in shops to the public, with the proceeds going to Children in Need.
*The [[Dalek]]s were supposed to appear, but the segment was scrapped after a disagreement with Dalek creator [[Terry Nation]] over payments. The Dalek segment would have seen [[Peter Davison]] facing up against them again in the streets seen in the 1984 serial ''[[Resurrection of the Daleks]]''.
*All actors and crew gave their services especially for Children in Need, and waived their fees on the condition that ''Dimensions in Time'' would never be repeated or sold on [[home video]] for profit. For the same reason, the story has and never will be released on [[DVD]] or appear as an extra on home video. Nevertheless, a short clip of Kate O'Mara from this special was used in the 2025 television episode ''[[Wish World]]''.