* CompleteMonster: Lady Felmet is modeled after LadyMacbeth, only multitudes more sadistic and cruel. The Duchess participated in the overthrow and murder of King Verence I for her husband Leonald to gain the throne for her own benefit and power. Once she inherits her position, she encourages a brutal suppression of peasants and witches alike while using the Fool to spread a propaganda campaign. Revealing herself as a sadist who loves ColdBloodedTorture, Lady Felmet personally engages in inventive torture with captives. When [[NeverMessWithGranny Granny Weatherwax]] removes the mental walls she put up and shows her all the evil in her own mind, she shrugs it off. Unlike most ''Discworld'' villains, the Duchess is fully aware how evil she is. She just doesn't care.
* FridgeLogic: Some of the ramifactions of the witches moving Lancre in time. The people don't generally seem too dismayed, but fans have wondered about Esk, the Lancre-born female wizard from Equal Rites. [[spoiler:This may possibly be alluded to in Discworld/IShallWearMidnight - but [[ShrugOfGod possibly not]].]]
** It also crops up in later books - shouldn't Granny Weatherwax now be another fifteen years younger than her childhood acquaintances like her sister Lily (''Discworld/WitchesAbroad'') or Mustrum Ridcully (''Discworld/LordsAndLadies''), not to mention when she goes to visit Mrs Palm again in ''Discworld/{{Maskerade}}'' (having previously met her in ''Discworld/EqualRites'')? At this point one really just has to resort to the MST3KMantra.
*** Mustrum Ridcully commented that she hadn't changed a bit, so maybe appearing 15 years younger than expected helped.
*** Lily was already older than Esme. Her relatively-youthful appearance is due to all the ethical tensions in Esme's life, that Lily never allowed to bother her. Lily's abuse of mirror-magic may also be somewhat to blame for her unchanging looks.
*** Mrs. Palm has been with the Seamstresses since before Vimes joined the force in Winder-era ''Night Watch''. By ''Guards! Guards!'' she's old enough for Carrot to assume she's the mother of the other prostitutes, and by ''Maskerade'' she's thinking about retirement.
** This is actually one of the reasons Terry eventually wrote ''Discworld/ThiefOfTime'', to explain away the [[TimeyWimeyBall wibbly-wobbly, timey-wimey]] nature of Discworld chronology. It all makes a twisted sort of sense that the progression of time is inconsistent between places.
*** Discworld also tends to take physics and exaggerate somewhat (such as the oft-mentioned relative slowness of light); time ''does'' move at somewhat different rates at different elevations. And Lancre is much higher up than Ankh Morpork.
* FridgeBrilliance: It's fairly obvious that the plot is based on that of ''Theatre/{{Macbeth}}'', but only those who know the background of the play (or read about it later) know that ''Macbeth'' is ''also'' like that: in RealLife, the historical Macbeth is usually considered to be the good guy and Shakespeare wrote the play in order to appeal to King James VI and I, who was the descendant of King Duncan.
* GeniusBonus: The Felmets' plan (based on the Fool's ideas) is to have Hwel write a play that presents them as the good guys and King Verence and the witches as villains, altering public perceptions. This is exactly what the original play ''Macbeth'' was, with Shakespeare whitewashing his patron King James I and VI's ancestors and painting Macbeth as a blackguard, when the historical record suggests he was seen as rather a decent king.
* HilariousInHindsight: The BoisterousBruiser king is murdered in a fake accident, his successor isn't actually the heir because the queen was having an affair, his actual son grows up with no idea of his noble birth, one protagonist is noted for the ability to possess the bodies of animals, and there's a snarky dwarf who has a way with words. [[ASongOfIceAndFire Sound familiar?]].
* IHaveToWashMyHair: Did Magrat not wash her hair so that she would always be available, or did she stop washing her hair so that she would always [[PlayingHardToGet have the excuse available]]?
* OneSceneWonder: In the AnimatedAdaptation, the demon the witches sum up becomes this in a way he wasn't in the book -- partly this is because he's the best-looking, best-animated character in the miniseries, but a lot of it is also due to the added joke of his voice suddenly goes from EvilSoundsDeep to high-pitched UpperClassTwit when Granny tells him to stop mucking about.
----