Season 6
Season six consists of 22 episodes. Creator Eric Kripke originally planned for the show to last only five seasons, but after increased ratings from the fourth and fifth seasons, The CW Television Network renewed the series for a sixth season.Kripke did not return as showrunner, but still remained as a hands-on executive producer, leaving executive producer Sera Gamble to take over the reins.
Original Run was from September 24, 2010 – May 20, 2011
The sixth season begins a year after the conclusion of the fifth season, with Dean living a somewhat happy life with Lisa and Ben. When an emotionless Sam returns to Dean, he is forced to leave his new life behind and work with his resurrected grandfather, Samuel, to capture Alpha monsters for the demon Crowley. The brothers are unable to get much help from Castiel while a civil war is going on in heaven against the archangel Raphael, and they cannot trust Samuel. Dean's suspicions are confirmed when he finds Samuel working with demons to discover the location of Purgatory. Dean discovers that Sam's soul is still in Hell, so he implores the help of the Horseman Death in order to retrieve it. To ensure Sam does not remember Hell, Death blocks that part of Sam's memory using a mental wall. The season first half revolves around the so-called Mother of All, which ultimately leads to events which proves that Castiel is behind the events of Sam's return, the hunt for the Alpha monsters, and the search for Purgatory, as he was working with Crowley this whole time. When the brothers try to stop Castiel, he brings Sam's memory of Hell back and goes ahead with his plan, absorbing all the souls from Purgatory and pronouncing himself God, after having ascended beyond a mere angel.
Original Run was from September 24, 2010 – May 20, 2011
The sixth season begins a year after the conclusion of the fifth season, with Dean living a somewhat happy life with Lisa and Ben. When an emotionless Sam returns to Dean, he is forced to leave his new life behind and work with his resurrected grandfather, Samuel, to capture Alpha monsters for the demon Crowley. The brothers are unable to get much help from Castiel while a civil war is going on in heaven against the archangel Raphael, and they cannot trust Samuel. Dean's suspicions are confirmed when he finds Samuel working with demons to discover the location of Purgatory. Dean discovers that Sam's soul is still in Hell, so he implores the help of the Horseman Death in order to retrieve it. To ensure Sam does not remember Hell, Death blocks that part of Sam's memory using a mental wall. The season first half revolves around the so-called Mother of All, which ultimately leads to events which proves that Castiel is behind the events of Sam's return, the hunt for the Alpha monsters, and the search for Purgatory, as he was working with Crowley this whole time. When the brothers try to stop Castiel, he brings Sam's memory of Hell back and goes ahead with his plan, absorbing all the souls from Purgatory and pronouncing himself God, after having ascended beyond a mere angel.