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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.
All Episodes - S11
EPS03
Sam and Dean try to help Castiel recover from Rowena's spell, while searching for Amara who has now grown into a young girl. Rowena tries to use her powers to protect herself from the Winchesters, while Crowley tries to use Amara for his personal gain.
EPS05
Sam and Dean investigate a series of murders at a local BandB that also happens to be Lizzie Borden's old home. When a man tells them he saw a little girl around the BandB around the time of the murders, the brothers realize Amara may be responsible. Written by Chad Ross
EPS06
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.
EPS08
Sam is shocked when his imaginary childhood friend, Sully, makes an unexpected appearance. Sam tries to understand why he is seeing Sully now. Even more surprising, Dean can see him too.
EPS09
Amara (guest star Emily Swallow) unleashes her power on the local townspeople as she issues a shocking challenge. Dean (Jensen Ackles) tries to better understand the hold Amara has on him, while Sam (Jared Padalecki) and Crowley (Mark Sheppard) come up with a plan that could have disastrous consequences.
EPS10
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 might have killed Amara.
EPS12
Claire believes recent murders in town are supernatural and asks Sam and Dean to investigate. However, Sheriff Mills tells the guys that Claire has been getting into trouble lately and has been attacking normal people and accusing them of being monsters. Written by Chad Ross
EPS14
Dean convinces Castiel, who is still Lucifer, to send him back in time to the last reported sighting of the Hand of God which could be useful as a weapon against Amara. Lucifer sees the potential in getting his hands on this weapon so goes along with it and sends Dean 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.
EPS16
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 anyone dies.
EPS17
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. Written by SPNTFW
EPS19
Sam and Dean are visiting a small town in Colorado where people are mysteriously disappearing every 27 years. While they are investigating, the boys encounter a pair of hunters seeking revenge on the monster causing the disappearances.
EPS20
Amara unleashes a dark fog on a small town, which causes everyone to go mad. Sam and Dean 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 the old remedy no longer works. Meanwhile, Chuck returns with an interesting proposal to stop Amara and save Lucifer and take Lucifer out of Castiel.