When Bart is expelled for an incident at a medieval-themed fair at school (even though it was Groundskeeper Willie's fault because he wasn't chosen to be a cooper [barrel maker]), heís sent to a Catholic private school led by an Irish priest (voiced by guest star Creator/LiamNeeson) who shows Bart and Homer the fun side of the Catholic religion. Naturally, Ned, Marge, and Reverend Lovejoy (who are Protestant) don't agree.
* AdultsAreUseless: Just because the school hates Bart doesnít meanÖ no, letís face it, they hate HIM to the point it was easy just to expel and let Willie get away. The only few exception would have to be Father Sean.
* BadassPreacher: Father Sean, Lovejoy, and Bart
* CassandraTruth: Practically nobody believes in Bart's pleas of innocence regarding the prank he was expelled for.
* CrisisOfFaith: The premise of the episode, similar to "Homer the Heretic" (season four episode where Homer creates his own religious beliefs and stays home from church) and "She of Little Faith" (season 13 episode where Lisa converts to Buddhism after the local church allows advertising).
* CelestialBureaucracy: A follow inhabitant of Protestant Heaven explains this to Marge.
** MundaneAfterlife: Protestant Heaven has cricket and badminton, while Catholic Heaven has a Mexican fiesta, Italian dinner, and Irish dancing.
* DistantFinale: After Bart convinces the Catholics and Protestants to get along, the episode ends on a fade to 1000 years later, where two armies are fighting over the words of "God's last prophet, Bart Simpson."
* DramaticGunCock: Parodied in the climactic MexicanStandoff when [[https://frinkiac.com/gif/S16E21/1191943/1195071/ all four get a closeup of pumping their guns]].
* DramaticIrony: Audience members can't help but feel sorry for Bart when he's getting flak from everyone for something they [the audience] know Willie was responsible for.
* FluffyCloudHeaven: Marge's ImagineSpot.
* JerkassRealization: Bart once again, he calms everyone down when he explains that Catholics and Protestants are both Christians, which got both sides to agree.
* KarmaHoudini: Groundskeeper Willie didn't get punished for the stunt he pulled and let Bart take the blame.
* NotMeThisTime: Bart tries to explain heís innocent and didnít do anything wrong despite having a reason to sabotage the fair, [[YouHaveToBelieveMe which itís true but seriously it's already explained]].
* TheScapegoat: Bart was forced to take the blame, despite the fact he had nothing to with the mayhem Willie did.
* StandingInTheHall: Bart is forced into this while at a private Catholic school.
* TooSoon, ScheduleSlip, and BannedEpisode: This episode wasn't supposed to be the season finale for season 16, but Pope John Paul II died around the time of its original airdate and FOX (not wanting to piss off any Catholic viewers), rescheduled the episode to air as a finale while the originally-intended finale ("The Girl Who Slept Too Little") was pushed to season 17.
* TwentyMinutesIntoTheFuture: Last part was set 1000 years in the future.
* WhatHappenedToTheMouse: It's never shown how Bart gets back into Springfield Elementary or if he is ever proven innocent of Willie's prank.