Episode 1 | Black

Dean is a demon and running amok with Crowley while Sam tries to figure out what happened to his brother. Meanwhile, Castiel is dealing with his diminishing grace.

Episode 2 | Reichenbach

Crowley is worried about Dean getting out of control, giving him a target to feed the mark. Sam struggles to escape from Cole. Hannah tries to convince Metatron to give Castiel's grace back.

Episode 3 | Soul Survivor

Sam continues to try to save Dean from the Mark of Cain. Realizing that Dean's antics are causing problems for him in hell, Crowley seeks help from a reluctant Castiel.

Episode 4 | Paper Moon

Sam and Dean investigate a series of werewolf attacks in an attempt to find out who the culprit is.

Episode 5 | Fan Fiction

Sam and Dean investigate a haunting at a theatre.

Episode 6 | Ask Jeeves

Dean encounters a surprising message on Bobby's phone, and Sam and Dean investigate.

Episode 7 | Girls, Girls, Girls

Sam and Dean discover a group of witches "gone wild" and they attempt to stop them.

Episode 8 | Hibbing 911

Jody Mills is matched with an overeager partner during a mandatory sheriff's retreat; when a gruesome corpse is discovered, Jody calls Sam and Dean to help investigate.

Episode 9 | The Things We Left Behind

When Castiel finds Jimmy's daughter in a group home, she persuades him to break her out; Crowley is faced with a big challenge.

Episode 10 | The Hunter Games

Sam and Dean try to deal with the aftermath following the bloodbath. Castiel attempts to fix a struggling relationship with Claire, and Claire wants revenge on Dean for what he did to her friend.

Episode 11 | There's No Place Like Home

When Sam comes across a video of Charlie attacking a district attorney, Dean thinks she has returned from Oz to hunt on her own.

Episode 12 | About a Boy

Dean is mysteriously transformed into a teenager. He has to deal with teenage struggles all over again, along with being a hunter.

Episode 13 | Halt & Catch Fire

To take his mind off of the Mark of Cain, Dean goes hunting. They track down a ghost that is killing college students through electronics and the internet.

Episode 14 | The Executioner's Song

Sam, Dean, and Castiel must deal with Cain's return. Rowena and Crowley grow closer.

Episode 15 | The Things They Carried

Despite Dean's directive to forget about looking for a cure for the MOC, Sam continues to do research. Dean suspects Sam is hiding something but decides to focus on a murder case where they run into Cole.

Episode 16 | Paint It Black

Dean and Sam investigate grisly, identical suicides by various people with little in common; the brothers begin to suspect that a priest is involved.

Episode 17 | Inside Man

Castiel comes back and he and Sam check out a lead on the Mark of Cain. They decide to go to Bobby for help. Meanwhile Dean and Rowena meet up.

Episode 18 | Book of the Damned

Charlie contacts Sam and Dean after she finds the Book of the Damned - which could help eliminate the mark of Cain; Castiel and Metatron look for Castiel's grace.

Episode 19 | The Werther Project

Sam looks for a magical box built by former Men of Letters, Magnus, hoping it will cure Dean, but is surprised by a deadly alarm system.

Episode 20 | Angel Heart

Castiel tries to reconnect Claire with her mother who went missing, and calls Sam and Dean for help with the case.

Episode 21 | Dark Dynasty

While investigating a strange murder, Sam and Dean discover the killer has the same tattoo as those from the Styne family; Castiel plays referee when Charlie and Rowena must work together; Crowley turns to an old enemy for help wi...

Episode 22 | The Prisoner

Dean takes matters into his own hands regarding Stynes; Sam attempts to come to terms with his decision.

Episode 23 | Brother's Keeper

Dean comes to a stunning decision that will alter his life -- as well as Sam's; Rowena and Crowley face off, putting Castiel in the middle.