History YMMV / DoctorWhoS23E4TheUltimateFoe

* HilariousInHindsight: The Doctor battles his evil counterpart in Film/TheMatrix, well before Neo took the red pill.

** That being said, she's enough of a trouper to film some new material as Peri for the ads for Season 22's Blu-Ray set, establishing that Peri took up traveling with Six again later (as per Big Finish), and goes back to Krontep to honor the memory of Yrcanos every year.

* EpilepticTrees: The cryptic information from the Master that the Valeyard is born between the Doctor's twelfth and final incarnations seemed clear cut at the time it was revealed, because this was back when the Thirteenth Doctor was considered the end of the line. Then comes the new series, which introduces an OddNameOut that completely throws the numbering off (the War Doctor), an aborted regeneration that created a clone of the Doctor (the Metacrisis Tenth Doctor from [[Recap/DoctorWhoS30E13JourneysEnd "Journey's End"]]), and an expansion pack to the regeneration cycle - and suddenly it becomes ''much'' harder to understand this once simple statement. And then it becomes even worse in the Chibnall era, when it's revealed that the Doctor actually lived an uncountable number of lives as the Timeless Child, long before the First Doctor came about. Or, y'know, maybe [[ILied the Master was lying.]]

** That being said, she's enough of a trouper to film some new material as Peri for the ads for this season's Blu-Ray set, establishing that Peri took up traveling with Six again later (as per Big Finish), and goes back to Krontep to honor the memory of Yrcanos every year.

* EpilepticTrees: The cryptic information from the Master that the Valeyard is born between the Doctor's twelfth and final incarnations seemed clear cut at the time it was revealed, because this was back when the Thirteenth Doctor was considered the end of the line. Then comes the new series, which introduces an OddNameOut (the War Doctor) that completely throws the numbering off, an aborted regeneration that created a clone of the Doctor (the Metacrisis Tenth Doctor from [[Recap/DoctorWhoS30E13JourneysEnd "Journey's End"]]), and an expansion pack to the regeneration cycle - and suddenly it becomes ''much'' harder to understand this once simple statement. And then it becomes even worse in the Chibnall era, when it's revealed that the Doctor actually lived an uncountable number of lives as the Timeless Child, long before the First Doctor came about. Or, y'know, maybe [[ILied the Master was lying.]]

* EpilepticTrees: The cryptic information from the Master that the Valeyard is born between the Doctor's twelfth and final incarnations seemed clear cut at the time it was revealed, because this was back when the Thirteenth Doctor was considered the end of the line. Then comes the new series, which introduces an OddNameOut that completely throws the numbering off, an aborted regeneration that created a clone of the Doctor, and an expansion pack to the regeneration cycle- and suddenly it becomes ''much'' harder to understand this once simple statement. And then it becomes even worse in the Chibnall era, with the uncountable number of lives the Doctor lived as the Timeless Child, long before the First Doctor came about. Or, y'know, maybe [[ILied the Master was lying.]]

* EsotericHappyEnding: Peri's body becomes the host to Kiv's brain before King Yrcanos supposedly finishes her. However, it is revealed later in this final episode that Peri in fact did not die and actually went on to rule Krontep alongside Yrcanos as his queen. While this is portrayed as a good thing, it should be noted that Peri showed no interest in Yrcanos the entire story and objected to the notion of becoming his wife. Expanded material has offered different versions of what become of Peri, though actress Creator/NicolaBryant prefers her original fate.

* EpilepticTrees: The cryptic information from the Master that the Valeyard is born from the Doctor's twelfth and final incarnations seemed clear cut at the time it was revealed, because this was back when the Thirteenth Doctor was considered the end of the line. The comes the new series, which introduces an OddNameOut that completely throws the numbering off, an aborted regeneration that created a clone of the Doctor, and an expansion pack to the regeneration cycle- and suddenly it becomes ''much'' harder to understand this once simple statement. And that's not getting into the uncountable number of lives the Doctor lived as the Timeless Child, long before the First Doctor came about. Or, y'know, maybe [[ILied the Master was lying.]]

* HarsherInHindsight: The Doctor's rant about how ten million years of civilisation has made the Time Lords corrupt becomes this now that it's been revealed in [[Recap/DoctorWhoS38E10TheTimelessChildren "The Timeless Children"]] that the civilisation was ''built'' on torture and experimentation of a ''child'' (and said child became the Doctor themselves, but no longer remembers it). As that episode would render the Doctor as the MonsterProgenitor of the Time Lord race, his rant retroactively comes across as being like a parent [[expressing his disappointment DisappointedInYou]] at their child's actions.

* EpilepticTrees: The cryptic information from the Master that the Valeyard is born from the Doctor's twelfth and final incarnations seemed clear cut at the time it was revealed, because this was back when the Thirteenth Doctor was considered the end of the line. The comes the new series, which introduces an OddNameOut that completely throws the numbering off, an aborted regeneration that created a clone of the Doctor, and an expansion pack to the regeneration cycle- and suddenly it becomes ''much'' harder to understand this once simple statement. Or, y'know, maybe [[ILied the Master was lying.]]

* HarsherInHindsight: The Doctor's rant about how ten million years of civilisation has made the Time Lords corrupt becomes this now that it's been revealed in [[Recap/DoctorWhoS38E10TheTimelessChildren "The Timeless Children"]] that the civilisation was ''built'' on torture and experimentation of a ''child'' (and said child became the Doctor themselves, but no longer remembers it).

* EsotericHappyEnding: Peri's body becomes the host to Kiv's brain before King Yrcanos supposedly finishes her. However, it is revealed later in the season that Peri in fact did not die and actually went on to rule Krontep alongside Yrcanos as his queen. While this is portrayed as a good thing, it should be noted that Peri showed no interest in Yrcanos the entire story and objected to the notion of becoming his wife. Expanded material has offered different versions of what become of Peri, though actress Creator/NicolaBryant prefers her original fate.

* HarsherInHindsight: The Doctor's rant about how ten million years of civilisation has made the Time Lords corrupt becomes this now that it's been revealed in [[Recap/DoctorWhoS38E10TheTimelessChildren "The Timeless Children]] that the civilisation was ''built'' on torture and experimentation of a ''child'' (and said child became the Doctor themselves, but no longer remembers it).

* EpilepticTrees: The cryptic information from the Master that the Valeyard is born from the Doctor's twelfth and final incarnations seemed clear cut at the time it was revealed, because this was back when the Thirteenth Doctor was considered the end of the line. The comes the new series, which introduces an OddNameOut that completely throws the numbering off, an aborted regeneration that created a clone of the Doctor, and an expansion pack to the regeneration cycle- and suddenly it becomes ''much'' harder to understand this once simple statement. Or, y'know, maybe [[ILied the Master was lying.]]