Mary asks Sam, Dean and Castiel for help on a case she’s working but neglects to mention the British Men of Letters are involved. When Mary is double crossed, everything is revealed.

Sam enlists Rowena’s help to track down an old world, powerful family of witches after Dean gets hit by a spell that is rapidly erasing his memory.

Lily Sunder steeps herself in black magic, honing her powers for over a century, waiting to exact revenge on a band of angels that murdered her family. Sam and Dean must work quickly to stop Castiel from becoming her next victim.

After being arrested for the attempted assassination of the President of The United States, Sam and Dean must find a way out of an underground, government-run, detention facility in the middle of nowhere. Determined to find her sons, Mary and Castiel seek assistance from an unlikely source.

Lucifer’s search for power and influence in a vessel lands him in the White House. The President of The United States unknowingly makes a deal with the devil, leading Sam, Dean, Castiel, Crowley and Rowena to band together to fight the Dark Lord.

Lucifer realizes that as rock star Vince Vincente, he can get his fans to do whatever he wants. Thrilled with this power, Lucifer arranges to play a secret VIP concert in order to kill all of them. Sam, Dean and Castiel enter the underbelly of the music industry to try to stop him.

When hunters gather together to celebrate the life and tragic death of one of their own, Sam, Dean, and Mary must take action when a demon starts picking off hunters one by one.

After learning that the soul of Adolf Hitler has been trapped in a 1930’s gold pocket watch, Sam and Dean must act quickly to prevent a group of Nazi necromancers from resurrecting the Führer.

Sam and Dean investigate a case that leads them to a devout religious family that lives off the grid. The brothers realize that the parents are hiding a huge secret that could destroy them all. Meanwhile, Dean struggles to accept Mary’s latest decision.

When a crying baby leads to death in a mysterious abandoned house, Mary, Sam and Dean decide to investigate. Meanwhile, Castiel’s hunt for Lucifer leads him, begrudgingly, to partner up with Crowley.

Dean, Castiel and Mary have a lead on Sam and set out to rescue him. Dean is uncomfortable with putting Mary in danger but she insists on going along. Meanwhile, Crowley is tipped off that Lucifer has taken over the body of rock star Vince Vicente.

Dean is overwhelmed as he comes face to face with his mom, Mary Winchester. Meanwhile, Sam is fighting for his life after Toni, from the Woman of Letters, shot him.

God comes to a decision about Amara that has direct repercussions for Sam and Dean.

Sam and Dean face their biggest challenge yet. Rowena makes her move.

Amara shows Dean how she’s torturing Lucifer. Worried for Castiel, Dean and Sam come up with a plan to rescue him from Amara’s clutches.

Amara unleashes a dark fog on a small town, causing everyone to go mad. Dean and Sam realize this is a stronger version of the original black vein virus Amara previously unleashed. They team up with the sheriff to protect the town but their old remedy no longer works. Meanwhile, Chuck returns with an interesting proposal.

In a small town in Colorado, mysterious disappearances happen every 27 years. Sam and Dean head to the town to investigate and meet two hunters who have a personal vendetta against these once-in-a-generation monsters.

Lucifer takes a trip home and tries to assert himself into Heaven. Crowley tells Sam and Dean he has a way to take down Amara.

Sam and Dean battle a pair of werewolves who have captured two victims. Just as the brothers are about to win, one of the werewolves shoots Sam. Dean gets his brother and the victims out of the house but learns a pack of werewolves are hot on their tail, hoping to kill them all.

A dangerous creature is accidentally released into an old house, attacking a mother and her child, leaving them both in a coma. Sam and Dean learn that Bobby and Rufus once tracked the same entity so the Winchesters look to the past to come up with a plan to catch the monster before any one dies.

Sam and Dean attend a wrestling match to relive one of their fondest memories but when a wrestler turns up dead they suspect foul play.

Hoping to find a weapon powerful enough to defeat Amara, Dean convinces “Castiel,” who is still Lucifer, to send him back in time to 1944 to the fated submarine mission that sunk the Hand of God. Meanwhile, continuing his charade with Sam while they wait for Dean’s return, Lucifer plans his next move.

Sam and Dean investigate a set of murders on Valentine’s Day and discover they are dealing with an ancient curse. Once kissed by the curse, the person is marked to die.

Sam and Dean drop in on Jody Mills, Claire and Alex after receiving a panicked phone call from Claire. She believes the recent murders in town are supernatural and wants the boys’ help. However, Sheriff Mills tells Sam and Dean that Claire has been getting into trouble lately as she’s been attacking normal people and accusing them of being monsters.

Sam and Dean investigate a case where people are suffering violent deaths after hearing a mysterious song.

Now that he has Sam in the cage with him, Lucifer offers Sam a way out but it comes with a steep price. Dean and Castiel look into the angel smiting that could have killed Amara.

Amara unleashes her power on the local townspeople as she issues a shocking challenge. Dean tries to better understand the hold Amara has on him, while Sam and Crowley come up with a plan that could have disastrous consequences.

Sam is shocked when his childhood imaginary friend Sully makes an unexpected appearance. Sam can’t understand why he’d see Sully now but what’s even more surprising is that Dean can see him, too. Flashbacks reveal young Sam’s friendship with Sully and why he needed him.

Sheriff Donna calls Sam and Dean for help after a horrific murder with supernatural elements happens in her town. Sam continues to have visions and asks God for help, which frustrates Dean.

Castiel seeks out Metatron’s help to stop the Darkness. However, Metatron is pretty happy with his new life as a freelance videographer for the local news and isn’t inclined to help the Winchesters or Castiel. Meanwhile, Crowley is losing his hold on Amara.

Sam and Dean investigate a series of murders at a local B&B that also happens to be Lizzie Borden’s old home. When a local man, Len, tells them he saw a little girl around the B&B around the time of the murders, the brothers realize Amara may be responsible.

Seen entirely from the point of view of the Impala, Sam and Dean go on a road trip to fight monsters and demons.

While Rowena tries to consolidate her power to protect herself from the Winchesters, Sam and Dean search for a missing baby connected to the Darkness. Meanwhile, Castiel struggles to heal and Crowley tries to find a way to use the Darkness for his own personal gain.

Dean helps Jenna, the deputy he met after the Darkness fell, get back home safely and then sets off to help Sam deal with a town infected by a mysterious and deadly gas. However, when Jenna falls into dangerous hands, she calls Dean for help and Sam tells him to go back to her. Unfortunately for Sam, he isn’t able to handle the townspeople turned monsters as easily as he thought.

Picking up where the finale left off, Sam and Dean must deal with the Darkness that has been unleashed. Castiel deals with the effects of Rowena’s spell and recalls his brutal battle with Crowley.

Dean makes a shocking decision regarding the Mark of Cain that would change not only his life, but Sam’s too. Meanwhile, Crowley and Rowena face off and Castiel gets caught in the middle.

When it comes to the Stynes, Dean decides to take matters into his own hands. Sam tries to come to terms with his decision.

Dean and Sam investigate a bizarre murder and realize the killer bears the same tattoo as those from the Styne family. Eldon Styne attacks Dean and a brutal fight ensues. Meanwhile, Castiel acts as referee when Charlie and Rowena are forced to work together on the Book of the Damned. Crowley discovers his mother is missing and knows she’s up to something so he turns to an old enemy for help.

When Claire Novak gets a lead on her mother, Amelia, who has been missing for years, Castiel asks Sam and Dean to help her. Castiel feels guilty for what he did to the Novak family and wants to make amends by reuniting Claire with her mom. However, when they find out what took Amelia, they realize there is a chance Claire may not get her happy ending.

Sam learns that former Men of Letters, Magnus, once built a magical box and Sam sets out to find it in the hopes it can cure Dean of the Mark of Cain. However, what he’s not prepared for is the deadly alarm system Magnus set up on the box. When Sam opens the box, he puts both his and Dean’s life in danger.