Castiel’s "God" phase ends abruptly when the Leviathans—ancient, hungry monsters—are released. This season is known for its darker tone, the loss of the Winchesters' beloved mentor Bobby Singer, and a corporate-horror vibe that sees the brothers stripped of their resources and forced to go "off the grid." The Carver Era (Seasons 8–9): The Trials and the Fall
The tenth season continues the story of Sam and Dean as they deal with the aftermath of the Apocalypse. The season introduces new characters, including Charlie (Felicia Day) and Kevin Tran (Charles Beeson). Supernatural all seasons 1- 2- 3- 4- 5- 6- 7- 8- 9
“God is nowhere. But the Devil… he’s in the details.” Supernatural all seasons 1- 2- 3- 4- 5- 6- 7- 8- 9
Notable episodes from Season 4 include: