Missed Opportunities on “Supernatural”
The episode that’s just Claire and Jack effectively stuck in a teen horror movie trying to solve a case while the adults in their lives are on other projects or need rescuing
The case episode where the three of them each want to keep the other two safe so they each go in to the same case alone in separate ways. It’s a cross between old school comedy of errors as they accidentally and on purpose avoid each other, and just plain craziness as you get most of the ep through an outsider’s eyes accidentally. Absolutely no FBI-badge was attempted
The Crowley-heavy episode based, however loosely, on the Summoner’s Tale, just because the title and the demon go hand-in-hand
Having Alt!Michael played by Matt Cohen. The horror in Mary’s experience of having her love, who in that universe was killed before he could father children, resurrected for such an awful purpose... it would have been poetic and god-awful at once.
The episode where they need to clear a location or stop a plane taking off, or create a distraction and they just call up Victor Hendrickson or his successor, tell the guy who they are, where they aren’t, and exactly what they need the FBI to do for them without knowing they’re being helpful
The episode where Dean and Sam get summoned to a distant future, maybe to stop Rowena, since legend has it only Sam can kill her, and they don’t know he already has. This would also make an acceptable retcon for 15x20.
Jack deciding that he should get to grow up and therefore becoming an infant with the last of his power before he loses it, instead of becoming God (or being taken over by God, who knows...)
Castiel and/or Sam as Death
An explanation of why OG!Death killed himself (you give that scythe to Dean Winchester and tell him to use it on his brother, dying should be completely obvious, even if you don’t know him as well as OG!Death seems to have done)
Making Chuck’s ending include everyone lending themselves to it, instead of Jack serving as a hungry hungry hippo of divinity
Episode with a grown Ben or some other early season kid who is now a hunter for no obvious reason
I’m sure I’ll come up with more as I go. And God knows I should write fics for all of them. But I’m me and I do not know.