Written by Pirata Hermosa
When we last left our heroes Sam (Jared Padalecki) and Dean (Jensen Ackles) in Season Four, Sam had just slain the demon Lilith, inadvertently breaking the final seal which released Lucifer and started the Apocalypse. In season five, the brothers try to find a way to save the world by either killing the Devil or sending him back to Hell.
But finding a way to vanquish Lucifer isn’t an easy task, and compounding things even more is that the angels whom you would expect to fight on their side are actually looking forward to the Apocalypse and settling things once and for all. This puts Sam and Dean in the middle of the fight between good and evil.
While there are some direct confrontations with Lucifer, the only thing that keeps the duo alive is the fact that Sam is destined to be Lucifer’s vessel on Earth and Dean is destined to be the vessel for the Archangel Michael. And even as powerful as the two beings are, they cannot possess a vessel without that vessel's permission.
With the help of the angel Castiel (Misha Collins) who turns his back on his brethren to help the two brothers, the three find themselves on a journey to find God, defeat each of the four horsemen, and risk their very souls.
There are still several self-contained episodes during season five like “Changing Channels”, where Sam and Dean find themselves trapped inside a television world by the Trickster and must find a way to escape. It’s one of the better episodes, even though we’ve seen this similar idea in films and other television shows. But it’s the main arc of the show that has become more significant.
Every episode is linked somehow to the Apocalypse. Whether it’s an episode focusing on the loss of hope as God is nowhere to be found, walking into a Supernatural convention based on their story, or running into gods of other religions, it all comes together.