Supernatural Seasons 1-5 [verified] -

– After Dean makes a deal to save Sam’s life, the brothers spend the season trying to break his contract before he is dragged to Hell. Season 4: Angels and Seals

But Kripke plants seeds in the soil of that first season. The yellow-eyed demon, Azazel, isn’t just a villain; he is a gardener. By Season 2, we learn Sam was one of several "special children" fed demon blood as an infant. By Season 3, the demons are organizing, and Dean sells his soul for a year of life. By Season 4, the angels descend—and they are not benevolent. They are militaristic, arrogant, and led by the ruthless archangel Zachariah. Suddenly, the road trip has turned into a war for the planet. Supernatural Seasons 1-5

The Righteous Man. A blue-collar hero who masks a traumatic childhood with classic rock, cheap food, and a sarcastic wit. His journey from loyal soldier to a man willing to say "No" to Heaven defines the series. – After Dean makes a deal to save

– The brothers reunite to find their missing father and hunt the "Yellow-Eyed Demon" that killed their mother. Season 2: The War Begins By Season 2, we learn Sam was one