!The musical:
* ColbertBump: It's received a lot more attention lately after being revealed as the favorite musical (and movie) of Lewis Lovhaug, the host of the wildly popular ''WebVideo/AtopTheFourthWall'', with him citing the important role it played in forming his personal sense of morality as a child.
* SparedByTheAdaptation: King Pellinore, who [[spoiler: gets killed off half-way through Literature/TheOnceAndFutureKing]], survives until the end of the movie and is with Arthur in his final battle.

!For the TV Series:
* DuelingShows: ''Series/GameOfThrones'' and more loosely ''{{Series/Merlin}}''.
* [[HeyItsThatGuy Hey, It's That Guy!]]:
** Arthur is [[Film/SweeneyToddTheDemonBarberOfFleetStreet Anthony]], [[Literature/{{Twilight}} Caius]], and [[Film/HarryPotter Gellert Grindlewald]].
** Morgan is [[Film/CasinoRoyale2006 Vesper Lynd]] and [[Film/KingdomOfHeaven Queen Sibylla]].
** Merlin is [[Film/ShakespeareInLove Shakespeare]] and [[FlashForward Mark Benford]]. He's also [[Film/HarryPotter Voldemort's]] brother.
** Igraine is [[Film/MeetJoeBlack Susan]]. Or [[{{CSINY}} Dr. Peyton Driscolli]].
** Guinevere's father is [[{{Sharpe}} Sgt. Patrick Harper]].
** King Lot is [[Series/{{Rome}} Mark Antony]].
** Gawain is [[Series/RobinHood Archer]] and [[Series/{{Vikings}} Rollo]].
** Vivian is [[Series/DoctorWho Chanto]].
* StillbornFranchise: In the season finale, [[SequelHook the Round Table is established, and Mordred is conceived]]. Then the show was axed. The official reason was lead actors having prior commitments, but lower viewership and critical reception compared to contemporary shows like ''[[DuelingShows Game of Thrones]]'' didn't help.