Okay, when the demon-killing knives were introduced, I thought these knives were equivalent to the Colt as a knife. I guess it was because of the importance the Colt represented at the time, and since Sam and Dean no longer owned it by the end of Season 3, it simply occurred to me that the knives were alternatives to it, only less effective because they were knives and the demons had telekinesis (although that last factor was never taken into account again).

That's why things like Castiel surviving being stabbed with one of these, and Allister's case as well, were much more shocking to me than they should have been.

A silly thought I had at the time.

Ok, so in the first episode a djinn was introduced, it is established that a knife dipped in lamb blood is needed to kill them. However, couple seasons later, Dean and Sam killed one via blunt force trauma to the head which is not only lore breaking but it just doesn’t make any sense. For starters, it completely undercuts their first appearance episode as Dean could’ve just used a hammer from Home Depot which I’m pretty sure is much easier to obtain than lamb blood. Or just use anything in his surroundings to bash the djinn’s head which just undermines the stakes. Secondly, someone in the distant past had to discover that lamb blood is required to kill a djinn which likely involved trying out multiple killing methods. I highly doubt that they would not try boinking its head with a mace or something nor would they neglect to pass that information down. Oh, and the djinn Dean killed with some random object was enhanced by archangel grace so it should be more powerful and durable than a regular djinn yet it went out like some regular chump. Now, I get that there are going to be gaps in information because of what past hunters had access to. I can buy that djinn can be killed with explosives since gunpowder was either expensive or just wasn’t invented yet. I could also understand that an angel blade would do the job since it’s a weapon forged by God. But it’s extremely illogical for hunters to overlook a mundane killing method when it works well and is much easier to accomplish than getting lamb blood.

Samhain: A special demon who was the origin and personification of halloween itself. Once he's risen, literally everything that all hunters and men of letters regularly face (minus angels) rise with him. He deserved a bigger role than what he got. Sure, summoning him breaks one of the seals but he was portrayed as just another monster of the week. He could've been one of the reasons why Sam and Dean's lives are the way they are and why hunters, men of letters, and the creatures they hunt exist in the first place, putting him in the same league as Eve if not above her outright. While Eve was the mother of all monsters, Samhain could, essentially, be the father of them.

Pride: One of the demons embodying pride itself, the deadliest among sins and source of all sins. He should at least be one the reasons for Lucifer's fall from grace and the creation of other demons. The deadly sins should've been above all other demons, and maybe even archangels, in every way; power, influence, hierarchy, lifespan, etc. with Pride being the oldest, strongest, and evilest among the other sins as well as being their leader.

Adolf Hitler: Bringing Hitler himself into the series was such a surprise. It made me wish that these Nazi related plots were compiled into one season, they were the primary arc of that season, and Hitler was the main/final villain of the season. Yes, Dean can still be the one to kill Hitler at the end of the last episode of the season.

This was a theory I had around Season 5, and one I believed up until Season 11, and I wanted to share it now:

Okay, the reason why Castiel was brought back to life by God wasn’t just so he could keep accompanying Sam and Dean, but also because God wanted Heaven to have a leader who knew what human affection was, and who understood how fascinating the human species was up close—a leader who wouldn’t be distant from them and who could lead for good, unlike Michael. That leader being Castiel.

Becoming a fallen angel and gradually losing his powers, being resurrected and losing his memories to become Emmanuel, losing his grace and turning human—these were all trials Castiel had to overcome in order to learn from humanity and become a just leader. And going through them would bring a reward, like becoming a Seraph. Once he completed them all, God would make him the most powerful Archangel, to mirror and maintain the hierarchy with Michael, the former great leader.

The idea of Cas being turned into an Archangel always appealed to me, especially since Season 8 confirmed that he was now a Seraph. Even though Season 11 confirmed that Chuck had only brought him back for the Winchesters, the idea still captivated me. In Season 13, when Jack transferred part of his power to Cas, I thought for a moment that he had turned him into an Archangel. Later, at the end of the series, with all the Archangels dead, I thought Jack would make Cas an Archangel to be his right hand, just like Michael once was for Chuck—but no.

It’s a shame that the whole buildup of the "Castiel becoming Heaven’s leader" ended up meaning nothing, and that heaven absolutely needed God's help to remain stable.

Well this is an idea I've had around the S11 demon tablet for a long time:

Okay, Cas couldn't find the Demon Tablet at Metatron's house, then he found Metatron with his angel powers again. Metatron would reveal to Cas that he gave the Demon Tablet to Crowley in exchange for angelic grace, Crowley now in possession of the tablet.

A story arc where Crowley used the Demon Tablet to empower himself in the same way Metatron used the Angelic Tablet would have been very interesting. Obviously, without the whole meta-narrative of Metatron in Season 9, focusing more on the fact that Crowley is no longer just the titular King of Hell, but IS now a genuine Demon King with the power of the tablet, perhaps it could have been explored how terrifying the character could be with real power in his hands, power with which he could take his ambitions beyond hell.

Did they have actors/actresses?

In season 11, we are formally introduced to the Character of God, who turns out to be Chuck, the supposed prophet of the Lord. He now seeks Metatron’s help to write his autobiography—or rather, his suicide note. This is because Chuck was afraid of Amara, but more than anything, afraid of having to confront her for what he did to her. He also shows disappointment in the actions of humanity and the angels. But then Metatron manages to convince him that he is a coward for giving up on his sister, unlike humans who never give up. This convinces Chuck, and he decides to seek Sam and Dean’s help, also saving Hope Springs. Even before meeting them, Chuck was already helping some civilians before taking the brothers to the bunker. Once in the bunker, Chuck sends Kevin to Heaven, allowing the brothers and the prophet to have one last, heartfelt farewell. Throughout this episode, we are shown several interesting things about God: he prefers to be called Chuck rather than God, he also doesn't like people bowing down to him and paying him reverence; he finds fascination in small aspects of his creation, like making a cat blog, petting a dog, playing the guitar, or attending a girl’s Supernatural play to praise her. Yet, he also demonstrates disappointment in humanity and the angels. However, after reflecting, he saves and helps the citizens of Hope Springs. In the same episode, he mentions that he has gone on dates with humans. In the following episode, he shows a fondness for children because of their eternal optimism. And, apparently due to Metatron’s confrontation, he seemed hurt and remorseful for abandoning them.

Let’s go back for a moment to earlier seasons. In S4, Chuck told Sam that drinking demon blood was wrong. In S5, he passed some information to the brothers about Michael’s sword. In the same season, in an alternate future, it was seen that Chuck helped Dean and the apocalypse survivors. He also helped keep the Supernatural convention fans safe and helped Dean find the place where Michael and Lucifer would fight.

Regarding the angels, as mentioned before, he didn’t approve of their actions. But in the end, he opened up to his son, Lucifer. On the verge of tears, he revealed that he believed Lucifer would be stronger than the seal of Amara, hating himself for what he had done and apologizing to him. He also showed compassion for Castiel in S4 when Castiel had to face Raphael. Near the end of the season, despite the possibility that demons, angels, and witches wouldn’t want to cooperate—and despite the fact that Chuck could force them—he chose not to. At the end of the season, Chuck was willing to surrender himself to his sister to save his creation. But after being poisoned by Amara, Chuck accepted his death along with the possibility of killing his sister to save his creation. Even though this didn’t happen, he was willing to do it. In the end, Chuck just wanted to show his sister that there could be more than just the two of them, and that they could still enjoy each other’s company.

We had a God who, although distant, genuinely cared for his creation. He considered the overprotection of his creation as something negative, preferring humans to find their own path—even if that led to many problems within the human species. Those were their decisions, just as it was with the angels. This God preferred to be called “Chuck,” choosing a human identity over his divine one. He had no plan to follow, only enjoying the little things of his creation and the mutual affection with his sister. And besides, he never turned anyone into salt… Or did he?

When Chuck returned in the final episode of season 14, he showed a strange behavior, manner of acting, and dialogue, arriving with a radical option to stop Jack: killing him and also killing the one who shot him. He even refused to restore Jack’s soul, arguing that for him, souls are complicated to understand, and that maybe Team Free Will wouldn’t even want that. At the end of the episode, it’s revealed that Chuck had been playing all along—that for him, Sam and Dean’s entire lives were a massive show created solely for his entertainment. He killed Jack as punishment for Sam and Dean’s defiance. Jack—his grandson, Lucifer’s son. Chuck then attempted to end the world by opening the gates of Hell.

In season 15, Chuck behaves radically differently from the Chuck of S11. He tries to use his sister as a tool both to heal himself and to become invincible. He personally tortures several humans, treating them like dogs—like Becky and the Radio Shed employee. He even controls Eileen to torture Sam and it was revealed that he sent Kevin's soul to hell. He also sees the angels as more of his toys, killing Michael even though Michael was completely loyal to him. Chuck goes so far as to destroy all the universes, and ultimately wipes out all life on Earth, punishing Sam, Dean, and Jack. Additionally, Fortuna revealed that God created the Deities only because humans refused to acknowledge his benevolence.

In S15, we have a narcissistic, psychopathic, prideful God who no longer finds love or compassion for his creation, seeing it entirely as a means of entertainment—Sam and Dean being the protagonists of a massive show. It’s just another of God’s favorite stories: the tale where one brother kills the other.

Seasons 14 and 15 not only completely ruin a character whose development had already concluded with a satisfying ending, but also ruin an interesting interpretation of God—culminating in the cliché of a mad writer/God, a Metatron 2.0. Now, looking at it in perspective, it’s almost as if they were two completely different characters, practically with a different “aura,” so to speak, acompletely different aura, noticeable in the last episode of S14, even before the plot twist. Chuck turning out to be a master puppeteer with a masterful showmanship was disappointing and contradictory, considering some of his past actions. Because of this plot twist, all of the character's past interactions become meaningless, as he simply sees Sam and Dean's gigantic story, and, at least in my opinion, that became a waste of time.

This isn't about whether the writers had Chuck in mind as the ultimate villain, but rather that the creator's interpretation of this series was interesting, at least as I saw it: a failed writer who distanced himself from his creation for safety reasons. Turning Chuck from a failed writer into a malicious one was a bad idea.

P.S.: Sorry if there are spelling mistakes.

Friendly reminder that Sam never heard Dean’s original voice message

Is this close enough

I don't know anything about this thing, I've only known it for 6 minutes as the series that made the damn Adolf Hitler have a Horcrux