Season 3 (Dean’s deal and consequences)
More importantly, it solidified the "Brotherly Bond" trope in pop culture. The Winchester brothers became a shorthand for dysfunctional loyalty. The show’s fandom (the SPN Family) was born during these seasons—not because of the jokes, but because of the raw, emotional pain of watching two boys try to save the world while losing each other. Supernatural Seasons 1-5
The stakes escalate as the brothers hunt Azazel , the demon responsible for their family's tragedy. We learn of Sam’s "special" psychic abilities and the existence of other children like him. The Turning Point: Deals and Destinies Season 3 (Dean’s deal and consequences) More importantly,