Season 5

Season Summary
Following directly after Sam Winchester's actions of him killing Lilith with his powers, Lucifer is released inadvertently. There, in the chapel, Sam and Dean stand in complete and utter awe as Lucifer rises from the bowels of his cage. As the archangel rises, Sam and Dean rush towards the doors to leave but they swing shut before they can. Engulfed in white light produced by the Devil's true form, a piercing ringing sound forces the brothers to their knees. But before Lucifer fully ascends from his cage, the two brothers are mysteriously teleported onto a plane goign over Illchester, Maryland where Lucifer is ascending. From the plane, Dean and Sam witness Lucifer's release from the Cage where his mere essence has launched an intense column of light from the shaft of his Cage.

Subsequently, War emerges from Darfur and assumes human form. Shortly after, Famine and Pestilence arrive in human form.

Chuck informs Dean and Sam that Castiel is dead because an archangel completely oblitherates him. Zachariah and two angel grunts locate Dean and try to enlist him but he banishes them using a banishing sigil. Somehow resurrected, Castiel returns, kills two angels, and inscribes angelic runes into Dean and Sam's ribs, which will conceal them from all angels in all of creation, including archangels. Roaming free, Lucifer hones in on a lone widower named Nick. Lucifer promises to get justice for Nick if he allows him "use" him as a vessel, he reluctantly agrees, and the Devil takes over the man's body, and with the new body, he is back to his full strength.

Days later, after War's emergence, a small town gets infested with demons. Castiel arrives at a hospital, and talks with Dean, Sam and Bobby about what will likely transpire with Lucifer risen. With Dean's magical amulet, he embarks out to find God - the only being besides Micharl that can defeat the Devil. Overwhelmed with their large numbers, Rufus Turner, an ex-hunter, calls Bobby for help. Injured and wheelchair-bound, Bobby send Dean and Sam instead. In the town, Dean and Sam run into an old friend: Ellen Harvelle. Sam and Ellen leave to find Rufus and Jo, who have supposedly been captured by demons. In the mission, Sam getsn captured by a possessed Jo and Rufus, and Ellen flees. After further research, Dean deduces that the town isn't actual infested with demons, instead War, one of the Four Horsemen, is loose, wreaking havoc. Eventually, the brothers cut-off the Horseman's ring-finger and take the source of his powers: his ring. With his ring gone, the Horseman is forced to flee. Sam realizes that he is dangerous and he parts ways from Dean.

Season Cast
Jensen Ackles as Dean Winchester (22/22)

Jared Padalecki as Sam Winchester (22/22)

Misha Collins as Castiel (15/22)

Jim Beaver as Bobby Singer (10/22)

Mark Pellegrino as Lucifer (5/22)

Kurt Fuller as Zachariah (4/22)

Rob Benedict as Chuck Shurley (4/22)

Mark A. Sheppard as Crowley (3/22)

Samantha Ferris as Ellen Harvelle (2/22)

Alona Tal as Jo Harvelle (2/22)

Richard Speight Jr.﻿ as Gabriel (2/22)

Cindy Sampson as Lisa Braeden (2/22)

Rachel Miner as Meg (2/22)

Emily Perkins as Becky Rosen (2/22)

Jake Abel as Adam Milligan (2/22

Links

 * http://www.imdb.com/title/tt0460681/episodes#season-5 *http://www.spoilerfix.com/supernatural.php *http://en.wikipedia.org/wiki/Supernatural_(season_5)