* CreatorsFavoriteEpisode:
** For Lochlann O'Mearain, it's the pilot.
** For Vincent Walsh, it's "Angus on Trial".
* DuelingWorks: The show aired during the same 1998-1999 timeframe as ''Series/YoungHercules'', and reportedly was made out of fear of the latter eating into sales and viewership of ''Power Rangers'' (even though all three shows aired on Fox Kids...) That said, ''Young Hercules'' was not an in-house Fox Kids/Saban show -- it was from the people who were producing [[Series/HerculesTheLegendaryJourneys the parent show at the time]], Studios USA[[note]]the renamed form of Creator/{{Universal}} Television after it was bundled with the Creator/USANetwork and sold to media mogul Barry Diller[[/note]] and [[Creator/SamRaimi Renaissance Pictures]], so presumably that also played a factor.
* ExecutiveMeddling: Shortly before cancellation, Joel Barkow recalls the network demanding "more action", and even wanting "The Trial of Angus" to open with a random battle scene.
--> "And it’s like, 'Apropo to what? I’m not sure how that would work with the story.' 'Well we don’t care, we want a battle scene.'"
* KeepCirculatingTheTapes:
** A long out-of-print VHS was this series' only home video media release in North America. It has never been released on DVD because of [[Creator/{{Disney}} Disney's]] buyout of the [[Creator/SabanEntertainment Saban]] library. It has, however, seen DVD release in [[GermansLoveDavidHasselhoff Germany]], of all places. It can be found online if you look but the only existing copies of the English version are heavily compressed and degraded rips from broadcast recordings that are nigh-unwatchable, making the show a particularly unfortunate version of the trope (Saban not reacquiring the show from Disney when it took back ''Power Rangers'' from them doesn't help matters).
** Thankfully, a much cleaner rip of the German dub surfaced and there's been extensive efforts from the [[https://mysticknightsoftirnanogpreservationproject.wordpress.com/mystic-knights-of-tir-na-nog-preservation-project/ Mystic Knights of Tir Na Nog Preservation Project]] to restore the original version of the show by syncing the audio from the low-quality english rips back to it.
* KidsMealToy: UsefulNotes/McDonalds sold a set of eight figures in 1999. These consisted of the four knights (Rohan, Angus, Deidre, and Ivar) and the four villains (Queen Maeve, General Torc, Midar, and Lugad). Each villain came with a piece of the Dragon, and collecting all four pieces would allow one to build a figure of the Dragon.
* PropRecycling: The Spectres of Banshee Woods seen in episode 24 are made up of Shellator and Fangula's bat monster form from ''Series/{{Beetleborgs}}'' and two unadapted monsters from ''Series/BFighterKabuto''.
* RealSongThemeTune: The German broadcast had a [[https://www.youtube.com/watch?v=qZLZ9Dn47Jw version]] sung by The Kelly Family.
* ScrewedByTheNetwork: The reason the show ended so quickly was because [[MerchandiseDriven the merchandise wasn't selling]]. Production of the second season was just beginning when the order came down. The remainder of the show's budget was funneled into ''Series/PowerRangersLostGalaxy'' instead. Which might have been for the best, that series had quite the TroubledProduction and they probably needed to stem their budget bleeding.
* ShowAccuracyToyAccuracy: Early toys show Ivar as being white, suggesting that Justin Pierce's casting was a case of AbilityOverAppearance.
* WhatCouldHaveBeen:
** The second season would have been called ''Mystic Knights: Battle Thunder'' and would have a sixth Mystic Knight named Liam, [[BlackKnight the Mystic Knight of Lightning]].
** Recent material uncovered by Mystic Knight of Spirit (who was responsible for spearheading the aforementioned Preservation Project) also suggests that there would have been a villainous Mystic Knight named Seanin, [[EvilCounterpart the Mystic Knight of the Swamp]] who would have been allied with Maeva. He would have been portrayed by Joseph Barton (archived images [[https://ia801504.us.archive.org/8/items/mystic-knights-image-collection/Seanin%20-%20Mystic%20Knight%20of%20the%20Swamp%20-%20Seosamh%20Online%20-%20Official%20Website%20for%20Joseph%20Barton.jpg here]] and [[https://ia801504.us.archive.org/8/items/mystic-knights-image-collection/Seanin%20-%20Mystic%20Knight%20of%20the%20Swamp.jpg here]].)