The best friends are never truly gone.
Though the Winchesters have been searching for a case, it's been pretty quiet and Chuck has yet to show up on the radar. While out on a run to clear his head, Sam sees something strange begin to materialize – none other than their former friend and hunter, Eileen Leahy.
Goodbyes are never easy.
After averting the last crisis, Rowena, Castiel, Belpegor and the Winchesters need to seal the rupture and stop the ghosts and demons for good. Everything seems to be going well but Rowena's spell fails. There are too many souls with too much hate and anger all trying to break free at once. Fortunately, Belphegor has a plan and it is not easy.
Even God can be afraid.
In Harlan, Kansas, the battle may be over but the war still rages on. They may have evacuated the town with the benzene cover up but after two days, the residents are becoming stir crazy and want answers. On the other side of the barrier, the ghosts have had just enough and start to plan their escape, lead by none other than Jack the Ripper.
The beginning of the end.
Surrounded, battling for their lives against impossible odds and refusing to back down – the Winchesters and Castiel are fighting against a graveyard full of corpses possessed by ghosts. For everyone they strike down, another simply takes its place.
The right thing isn't always easy; sometimes it's hard and ugly.
The plan to keep Jack in the box has failed miserably. Now free from its confines, Jack unleashes his power on Castiel and the Winchesters before taking off. Now that Jack has proven more dangerous than ever, Dean thinks the only solution is to put the monster down that killed his mother.
Fool me once, shame on you. Fool me twice...
After the loss of Mary Winchester, the hunters gather to say their goodbyes but the time for grieving is short. With Jack still out there, Bobby refuses to sit around and plans on doing everything he can to track the Nephilim down. In his determination to save him, Castiel reaches out to heaven and meets with Duma.
A shell, incapable of holding life.
After arriving back at the bunker, Sam and Dean expected to see Jack and Mary but find themselves alone. When Dean calls Mary, him and Sam hear her phone in the room and know that something is wrong. They call Jack but he doesn't answer. They track his phone only to find him hopping across the planet from one continent to the next.
No turning back.
While getting ready for game night at the bunker, Dean has an alarming voicemail from Donatello – begging for help before speaking a mysterious language. Dean and Mary rush to his home only to find Nick waiting for them. He has Donatello and injected him with a lethal dose of poison. If they want to find him they have to give him what he wants.
If you hear a whistle, run.
After a girl is found dead in the woods in Iowa from a strange animal attack, Sam digs deeper and has found that several people have been found dead the in the same area across the past few decades. It's a case and one that will get him and Dean out of the bunker.
WWWD. What would the Winchesters do?
Still reeling from the loss of Maggie and the other hunters, Sam is running the tea ragged going from one hunt to the next. After he finds a new case where a man's head exploded inside of a gas station, Dean puts his foot down and insists that they need to slow down.