Supernatural Season 4 Episode 22: Lucifer Rising

When the last few of the 66 Seals are broken by Lilith's minions, Sam and Dean prepare for the big and probably futile fight in very different ways. Sam joins Ruby on a final attempt to kill Lilith before Lucifer rises, while Castiel and Zachariah tell Dean that it's time to play his part in stopping Lucifer.

Supernatural Season 4 Episode 21: When the Levee Breaks

Sam is becoming more and more inhuman. Dean and Bobby put him in the safe hold until he gets over his addictions. After Sam escapes with help, unknown to him, from Castiel, he finds Ruby and begins to feed once again. Dean begins to truly believe that the old Sam is gone for good.

Supernatural Season 4 Episode 20: The Rapture

Castiel has been sent back to Heaven. His human host, Jimmy, tries to regain his life. But the demons won't leave him alone and now his family is at risk. Sam and Dean can help a little, but they're going to need a "miracle" to win.

Supernatural Season 4 Episode 19: Jump the Shark

Sam and Dean are contacted by one Adam Milligan who claims to be John Winchester's son. The boys immediately suspect a demon trap and go to investigate. Adam turns out to legitimately be John's son and Dean is furious that John kept Adam's existence from them as well as sheltered Adam from the hunting life. Meanwhile other supernatural forces are at work, which lead to a tragic twist that neither Sam, Dean, or their new sibling could have guessed.

Supernatural Season 4 Episode 18: The Monster at the End of This Book

An author has been writing books about Sam and Dean since 2005. Sam and Dean try to figure out how he knows so much about them.

Supernatural Season 4 Episode 17: It's a Terrible Life

In an alternate reality mysteriously created as if Sam and Dean where never brothers and have never met, Sam and Dean work at a marketing office where they are forced to team up with one another when a series of mysterious suicides point to a ghost haunting the premises.

Supernatural Season 4 Episode 16: On the Head of a Pin

Castiel and Uriel ask Dean to torture Alastair for information. But when Alastair breaks free, Castiel starts to believe that their is a traitor among the angels.

Supernatural Season 4 Episode 15: Death Takes a Holiday

Sam and Dean try to find out why people in a small town are having near death experiences with alarming frequency by going into the spirit world.

Supernatural Season 4 Episode 14: Sex and Violence

The Winchester's investigation into a series of deaths takes a deadly turn when a siren tries to tear them apart for good.

Supernatural Season 4 Episode 13: After School Special

Sam and Dean investigate a haunting at one of their old high schools where we will see what school was like for the brothers.

Supernatural Season 4 Episode 12: Criss Angel Is a Douche Bag

Sam and Dean investigate the activities of a trio of magicians who are using a grimoire to execute real feats of magic.

Supernatural Season 4 Episode 11: Family Remains

The Winchesters try to stop a family from moving into a haunted house.

Supernatural Season 4 Episode 10: Heaven and Hell

Dean and Sam figure out why Castiel and his superior/handler, Uriel the Angel of Death, want Anna Milton dead when the three of them are forced to go on the run, not only from heavenly and vengeful angels, but from Alastair and his demon minions who also try to track down Sam, Dean, and Anna. With the assistance from the now-blind soothsayer, Pamela Barnes, they discover that 'Anna' is a fallen (former) angel and needs to seek her grace wings before the forces of both Heaven and Hell find them.

Supernatural Season 4 Episode 9: I Know What You Did Last Summer

Sam, Dean, and Ruby discover the existence of a female prophet named Anna Milton, who can hear the voices of angels and thus figures into the plans of a demon named Alastair who wants to use her as a tool against the angels.

Supernatural Season 4 Episode 8: Wishful Thinking

Sam and Dean investigate when a small town's wishing well actually starts to grant the people's wishes.

Supernatural Season 4 Episode 7: It's the Great Pumpkin, Sam Winchester

Investigating two mysterious deaths in a small town, Sam and Dean discover a witch is sacrificing people to summon a dangerous demon.

Supernatural Season 4 Episode 6: Yellow Fever

Sam and Dean discover a Colorado small town's darkest secret as a wave of people fall prey to a "ghost sickness" that induces fear, paranoia, and ultimately a fatal heart attack. Sam and Bobby must figure out the cause and cure of the sickness when Dean himself falls prey to it.

Supernatural Season 4 Episode 5: Monster Movie

It's Halloween time and the Winchesters face-off against a shapeshifter with a penchant for impersonating classic movie monsters like Dracula, the Wolfman, and the Mummy.

Supernatural Season 4 Episode 4: Metamorphosis

A hunter named Travis points Sam and Dean towards a meat eating creature called a Rugaru. Complicating matters is the fact that Travis's target is a normal suburban dad in the earlier process of changing and he hasn't killed anyone yet.

Supernatural Season 4 Episode 3: In the Beginning

Castiel sends Dean back in time to 1973 where he encounters younger versions of his parents and for the first time meets his grandfather Samuel Campbell who holds a secret that sheds a light on the Winchester Family's connection to the hunter community.