Lucifer battles Sam, Dean and Castiel for control of his unborn child. This is the epic season finale showdown.

Caught in a dangerous situation, Sam and Dean only have each other to rely on. Meanwhile, the fight between the American hunters and the British hunters comes to a head.

Sam and Dean are alarmed when they learn hunters are being killed by suspicious “accidents” all over the country. They decide it is best to find Mary and make sure she’s safe.

Alicia Banes calls Mary for help after her mother, Tasha, goes missing. Sam and Dean answer the call to help the two of them out. Meanwhile, Mary has a decision to make.

Sam comes up with a way to stop Lucifer’s baby but Castiel has something else in mind for Kelly. Kelly makes a bold choice about the baby’s future.

On Supernatural Season 12 Episode 18, Sam and Dean investigate a missing person’s case where the attacker is said to be a man with the head of a goat

Sam and Dean get a lead on Kelly Kline’s whereabouts. Mick drops by the bunker unexpectedly and decides to join the hunt.

Sam and Dean let Mick Davies tag along on a case as they search for a werewolf. The three men run into Claire Novak, also working the hunt.

An attack by an invisible hellhound at a campsite leads Sam and Dean to investigate the mysterious circumstances. Meanwhile, two of Crowley’s own personal demons uncover what he has been hiding.

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 doing their best to recruit Sam and Dean.