Dean is shocked when he comes face to face with his mom, Mary Winchester; Sam fights for his life after being shot by Toni.
Dean, Mary and Castiel set out to rescue Sam; Crowley discovers that Lucifer has taken over the body of rock star Vince Vicente.
Mary, Sam and Dean investigate when a crying baby leads to a death in an abandoned house; Castiel partners with Crowley in his hunt for Lucifer.
Sam and Dean investigate the members of a devout religious family who live off the grid and are hiding something that could destroy them all; Dean struggles to accept Mary's latest decision.
Sam and Dean race to prevent a group of Nazi necromancers from resurrecting the führer after finding out the soul of Hitler is trapped in a pocket watch from the 1930s.
Sam, Dean and Mary take action when a demon starts picking off hunters that have gathered to celebrate the life and tragic death of one of their own.
When Lucifer learns that he can get his fans to do whatever he wants as the rock star Vince Vincente, he arranges a VIP concert to kill all of them; Sam, Dean and Castiel try to stop him by entering the underbelly of the music industry.
Lucifer's thirst for power leads him to the White House, where the United States president unknowingly makes a deal with him; Sam, Dean, Castiel, Crowley and Rowena team up to fight the Dark Lord.
Sam and Dean must find a way to escape from a government-run detention facility; in an effort to find her sons, Mary and Castiel seek assistance from a surprising source.
Lily Sunder hones her powers in black magic for over a century to exact revenge on a band of angels that murdered her family; Sam and Dean try to stop Castiel from becoming Sunder's next victim.
Sam gets Rowena's help to find a powerful family of witches after Dean gets hit by a spell that is rapidly erasing his memory.
When Mary asks Sam, Dean and Castiel for help with a case, she fails to mention that the British Men of Letters are involved.
The investigation into a murder at a museum reveals a ghost from a merchant ship may be to blame; Kelly seeks protection from a demon after an angel tries to kill her.
A chance to take out a nest of vampires backfires when the alpha-vamp shows up and turns the tables on Mary and the British Men of Letters who are trying to recruit Sam and Dean.
Sam and Dean investigate the mysterious circumstances of an attack by an invisible hellhound at a campsite; two of Crowley's own personal demons uncover what he has been hiding; Castiel discovers a lead on Kelly Kline.
Sam and Dean run into Claire Novak while searching for a werewolf with Mick Davies; when Claire gets bitten, the brothers race to find a way to save her before she turns.
Sam and Dean get a lead on the whereabouts of Kelly Kline; Mick makes a surprise visit to the bunker and decides to join the hunt.
When Sam and Dean investigate the case of a missing person, the lead witness says the victim was attacked by a man with the head of a goat.
Sam devises a way to stop Lucifer's baby; Dean is furious when he discovers that someone stole the colt; Kelly makes a bold choice about the baby's future.
Alicia Banes calls Mary for help after her mother goes missing; Mary begins to have some doubts about the British Men of Letters.
Sam and Dean worry about Mary when they learn hunters are dying in suspicious accidents all over the country; Toni and Mary face off.
Sam and Dean have only each other to rely on when they're caught in a dangerous situation; the fight between the American hunters and the British hunters comes to a head.