The Complete Second Season
Disparate plot points from the first season are woven together to create a continuity and mythology in the second season of Supernatural. The thing that killed the Winchester brother’s mom is now identified as the Yellow-Eyed Demon, and he seems to have some interest in Sam’s psychic powers.
Dean (Jensen Ackles) begins the the season in a coma, which he only comes out of through his father’s sacrifice. This weights heavily on him throughout the season; both for the injustice of it (the belief that his father’s life was worth more than his) and for the sense of responsibility he now feels for Sam (Jared Padalecki).
The brothers have encountered a number of people like Sam at this point, all with psychic powers, and most homicidal. Sam fears that his powers may hold the side effect of making him evil. This, of course, complicates things for Dean, who has to weigh his desire to protect Sam against his responsibility to hunt evil, as they both fear that those two lines may one day cross.
The knowledge of Sam’s powers, and the fear of what may come of them, spreads to other hunters, who do not feel an affinity for Sam and prefer to take a ‘better safe than sorry,’ approach to the situation.
Another unifying story in this season is Harvelle’s Roadhouse a dive of a bar /restaurant run by Ellen and her daughter Jo. Ellen’s husband was a hunter who once worked with Sam and Deans Father, a relationship that breeds familiarity, if not trust. The bar is a hangout for other hunters, most of whom we learn are loners with varying degrees of mental stability. The roadhouse conceit expands on the world of hunting, and in doing so, shows that there isn’t much to it. There’s no united front, and many of the other hunters we meet are little better than the things they hunt.
The roadhouse, psychic kids, and Yellow-Eyed Demon, are the basis of many episodes in the second season, but they remain largely episodic. The only difference being, that instead of a random supernatural occurrence, the one dealt with happens to be related to something we’ve seen before. With the introduction of a named big-boss demon, the demons step up as the primary villains of the series, instead of just being one of the many magic creatures they encounter. With the promotion, the demon-lore aspect of the series is fleshed out with various spells, exorcisms, and summonings. All of this creates a more focused mythology which is easier to get into and holds your interest between episodes.
Season two of Supernatural is a step up from season one. The over arching mythology of the series is expanded, and the plot is narrowed and focused. The season finale ties together not only the plot lines, but also the character arcs of Sam and Dean, resulting in a higher level of drama than we have thus far seen in the series.