Sam and Dean investigate a set of murders on Valentine’s Day and discover they are dealing with an ancient curse.

On Supernatural Season 11 Episode 12, Sheriff Mills worries that Claire has been attacking normal people and accusing them of being monsters.

On Supernatural Season 11 Episode 11, when people suffer violent deaths after hearing a mysterious song, Dean and Sam investigate the reason why.

Now that he has Sam in the cage with him, Lucifer offers Sam a way out, but it comes with a steep price.

Amara unleashes her power on the local townspeople as she issues a shocking challenge. Meanwhile, Sam comes up with a plan that could have disastrous consequences.

On Supernatural Season 11 Episode 8, Sam tries to figure out why he’s suddenly seeing his imaginary childhood friend and why Dean can see him too.

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.

Castiel seeks out Metatron’s (guest star Curtis Armstrong) help to stop the Darkness.

Sam and Dean investigate a series of murders at a local B&B that also happens to be Lizzie Borden’s old home.

Sam and Dean go on a road trip to fight monsters and demons. But the Impala becomes more important to the case than the brothers first thought.