Fanon Discontinuity / Supernatural

• Minor examples include "Season Seven, Time for a Wedding!" (Sam is drugged into being in love with Becky, who receives a scolding and nothing else for her actions), "Route 666" (racist truck), "Man's Best Friend With Benefits" (zoophilia), "Bloodlines" (a Poorly Disguised Pilot for a spinoff that wasn't picked up by the network due to negative reception) and the spelling of Castiel's nickname (canon: Cass; fanon: Cas).
  • Also a minor example, but some refuse to acknowledge that "Death's Door" in season 7 also happened, not because it was a bad episode (it was in fact one of the best of the season), but because it killed off Bobby, who was very popular and also regarded as one of the few voices of reason in Sam and Dean's life.
• Castiel's nickname is officially spelled "Cass". It was never adopted by fans even after becoming available knowledge in favor of the one-S version.
• Anti-Bela fans discount all implications of Dean and/or Sam being attracted to Bela, and many of their interactions.
• The season four introduction of angels into the series, a decision that greatly altered the focus and Myth Arc of the show, and resulted in the character of Sam Winchester not saving his brother from Hell, has led a small, but vocal group of fans to disavow developments beyond the third season finale.
• Likewise, a growing portion of the fanbase considers the fifth season finale to be the show's true ending (as Eric Kripke originally intended) and the sixth through fifteenth seasons to never have happened. Interestingly, this is explicitly mentioned in-series as being possible — Hallucifer claims that everything that's happened since is a drawn-out Mind Screw and Sam is still in the cage with him. This belief seems to have grown among fans since the series ended with a lukewarm finale that many felt ignored the show's central themes, with many taking a "take what you want, reject want you want'' attitude as far as the postscript seasons.
• It is tempting to disregard the events of Clip Show due to how Crowley ruthlessly murders several well-liked previous guest stars and then is Easily Forgiven in the next season. Plus, the episode isn't terribly essential to the overall plot and there’s an annoying unresolved Plot Hole about how Crowley picked his second victim.
• The deaths of fan-favorites The Harvelles are often disregarded, especially by fanfiction writers. It helps that despite their notable role, very few subsequent episodes reference their deaths.
• It's gotten to the point that some fans are hoping that the show will be cancelled while it still has a modicum of dignity left, owing to the latest bit of Discontinuity in season 9, where it was revealed that Reapers are actually angels, a plot that not only violates the established show canon but also just makes no goddamn sense. This has gotten especially vehement reactions from roleplayers as it has completely changed their characterisations.
• So many people would like to ignore Charlie Bradbury's death in late season 10, and that includes much of the cast and crew as well - besides the fact of it being a hugely egregious case of Bury Your Gays, damn near everyone pointed out to him that it was stupid, that Charlie could easily escape through the nearby window instead of cowering, that the character's emotional response made zero sense, and most significantly that the fallout from in the next couple of episodes could still be achieved without killing off Charlie at all. Notably, when asked about it at ComicCon that year, everyone else on the panel literally turned their backs on Carver and put him on the spot to show their absolute disapproval, with his attempted rationalising of the decision met by booing from the audience. The icing on the cake is that Kim Rhodes (who plays Sheriff Jody Mills) has stated point-blank that if the writers ever decide to bring Jody back just to kill her off like that, she will quit the show outright (forcing them to implement The Other Darrin) even if it means violating her contract and getting blacklisted for it... The decision is that widely loathed, even by people who weren't fans of Charlie.
• The Shoot the Shaggy Dog Story deaths of the occasional Monster of the Week who dies despite having the potential to get a normal life (like Magda-the psychic woobie Ketch kills- Lucy and Lenore the vampires, newly-turned werewolf Hayden, rugaru Jack Montgomery, Kitsune Amy Ponds, Olivia the shapeshifter, etc.) are things some fans won’t acknowledge.
• Several fans of Chuck like to pretend Season 14 was cancelled at its penultimate episode, considering the next episode is him revealing himself as the true Greater-Scope Villain of the series and murdering Jack, another fan-favorite in cold blood, and Season 15 being Chuck as the final Big Bad.
• A number of fans have chosen to pretend that the series finale's events never happened, due to it killing off Dean in a very anticlimactic way, providing no closure to Castiel's Heroic Sacrifice and Dying Declaration of Love from two episodes earlier, and having Sam marry a random unnamed woman even though previous episodes seemed to be setting up Eileen to be his endgame love interest. It didn't help that Dean's actor, Jensen Ackles, admitted that he was unhappy enough about the ending that he had to consult the original showrunner Eric Kripke to feel better about it. A fair share even state that the episode before the finale is a better series finale for it invokes And the Adventure Continues.
  • While there are some elements fans are likely to take as canon, such as Jack bringing Castiel back to help change Heaven into a place souls can live together peacefully, this comes with it's own set of problems. Despite the season supposedly setting Jack up to be an example of God Is Good, the evidence suggests he instead became a distant and uninvolved god who while not actively trying to torture the Winchesters like Chuck doesn't seem to care if they die. While he makes point in the penultimate episode of explaining that he won't be as involved as Chuck was, many feel that if he could fix Heaven than surely he could have also fixed the Earth to remove or cure all the monsters so Sam and Dean could retire. The Winchesters would reveal that Jack indeed became a more hands off God, restoring The Multiverse but refusing to get involved in anything.