Supernatural - 5x22 - Swan Song

Supernatural - Two Minutes to Midnight Season 5 Episode 21 Crowley tells Bobby he will give him the location of Death, the fourth horseman, in exchange for his soul. Knowing Sam and Dean need that fourth ring to stop the Apocalypse, Bobby reluctantly agrees. Sam and Dean confront Pestilence, but he unleashes a deadly virus upon them, so Castiel must intervene on their behalf. Dean has a meeting with Death to discuss Lucifer, and an unholy alliance is formed at a very high price for Dean.

Supernatural - The Devil You Know Season 5 Episode 20 The demon Crowley tells Sam and Dean he can help them find the remaining Horsemen rings so they can trap Lucifer. The brothers are doubtful until Crowley leads them to Brady, the Handler for Pestilence and Death. However, Brady refuses to give up their locations and sets Pestilence after the Winchesters.

Supernatural - Hammer of the Gods Season 5 Episode 19 Sam and Dean are kidnapped by a group of gods, including Kali, Ganesh, and Bladur and held hostage in a small hotel. The gods want to use Sam and Dean as bargaining chips to stop the Apocalypse, but Gabriel shows up and warns them that if Lucifer finds them he will kill them all. Unfortunately, one of the gods turns on the rest and Lucifer appears.

Season 5, Episode 18 Point of No Return

Supernatural - 99 Problems Season 5 Episode 17 Sam and Dean are outnumbered by demons, but are saved at the last minute by Rob and his townspeople, who are aware of the Apocalypse, and have been training to fight and kill demons. The small town is very religious and Sam and Dean meet Pastor Gideon, who introduces them to his daughter Leah, whom he claims is a prophet. Leah tells the townspeople they must obey her orders if they want a spot in Heaven but when she starts turning the townspeople against each other in the name of the Lord, the brothers realize they must kill her.

Season 5, Episode 16 - "Dark Side of the Moon"

Season 5, Episode 15 - "Dead Men Don't Wear Plaid"

Season 5, Episode 14 - " My Bloody Valentine"

Season 5, Episode 13 - "The Song Remains the Same"