Supernatural Season 6 Returns on September 24 on Its New Night, Friday at 9 PM Eastern

Season 5 of Supernatural focus on Lucifer walking on the Earth and Sam, Dean, Bobby and Castiel trying to stop him. Let's have a refresher on what happened in the season finale.

Season 5 Finale, Swan Song, Summary

The final and dreaded confrontation between the Winchesters and Lucifer is here. Dean knows that it will occur in Chicago and Bobby finds a definitive sign, so the Winchesters, Bobby and Castiel prepare for the final battle. The plan is for Sam to drink a few gallons of demon blood to give him the strength to overpower Lucifer after he is inside of Sam's body, upon which time Dean will use the 4 Horsemen's rings to open a doorway into Hell and Sam will throw himself and Lucifer to lock him back in his cage.

After Sam fuels up on demon blood, he and Dean enter Lucifer's building and accept his request to possess Sam's body. Lucifer knows all about the plan to use the rings but believes that he can overpower Sam inside of his mind. Lucifer possesses and overpowers Sam and closes the doorway. He allows Dean to live and departs to battle his brother, Michael, who has possessed Sam and Dean's brother, Adam.

Dean knows that Lucifer has won but doesn't want his brother to die alone, so he travels to the cemetery where Lucifer and Michael (Sam and Adam) in a last-ditch effort to save his brother. Lucifer and Michael want to do battle without interference and both are angry with Dean. Castiel temporarily forces Michael to leave and Lucifer loses his temper after interference and attacks them all -- he destroys Castiel, breaks Bobby's neck and starts to punch Dean to his death. Somehow Sam's memories of Dean gives him the strength to overpower Lucifer enough to open the doorway to hell with the rings and throw himself into it and also dragging Michael, who has returned, with him.

After the doorway to Hell closes with Sam on the other side, Castiel returns rejuvenated and heals Bobby and Dean. Keeping his promise to Sam, Dean retires from hunting and visits in order to begin an "apple pie" life with Lisa. Bobby continues hunting without the Winchesters and Castiel takes on the role of Sheriff for God.

At the end of the episode, we see Dean eating dinner with Lisa and her son. Chuck, the prophet, recants the story and after he concludes, he disappears from his seat at the computer. Outside a lamppost flickers and we see Sam.

Season 6 Rumors & Spoilers

Kripke will not return as show runner but will be executive producer. Current executive producer Sera Gamble will take over the show.

Misha Collins returns as Castiel.

Mitch Pileggi returns as Samuel Campbell, Dean and Sam's grandfather.

Kim Rhodes returns as Sheriff Jody Mills.

Fredric Lehne returns as the angel, Azazel.

Corin Nemec joins the cast as the recurring character, Christian, maternal cousin of Sam and Dean, His character is "capable, calm under pressure, and very good at his job."

Season 6 Synopsis

Heaven and Hell are in disarray after the Apocalypse. Angels and demons are free to do as they please. Sam and Dean reunite to battle evil once again but this time they are not alone -- their grandfather, Samuel Campbell, joins them. Sam and Dean realize that their relationship will never be the same.

Season 6 will follow the format of earlier seasons with closed-ended episodes but will still have a story arc for the whole season. The arc will revolve around Sam and Dean's new relationship after the events of season 5.

This season begins a year after season 5's finale. Dean is living with Lisa and her son, Ben, and has quit hunting. Sam somehow returns from Hell and tells him to start fighting and hunting again. He also brings Dean to their mother's family, the Campbells, and the patriarch, their grandfather, Samuel.

Season 6 Episode Synopses

Episode 1 - Exile on Main Street

"Sam is mysteriously released from Hell and seeks out his brother, trying to have a normal life. Together the brothers must join forces with their maternal grandfather, Samuel, and begin the fight anew."

Episode 2 - Two and a Half Men

"Sam asks Dean for help after finding a baby at the scene of its parents' murder. Meanwhile, Dean becomes angry when he learns that his grandfather, Samuel, decides to raise the child as a hunter."

Supernatural returns on September 24th on its new day, Friday at 9:00 p.m. Eastern on the CW after Smallville, which also returns on September 24th. Be sure to remember the new day it airs.

Sources: TV.com, Wikipedia, supernatural TV