Shape shifting, grave robbing, ghoul cowboys. Oh my!
Much to Sam and Dean's disbelief, Castiel has returned. Unlike the last time their winged friend returned from the dead, he remembers everything; even how he annoyed a cosmic being into resurrecting him. As much as they are surprised to see their dear friend back, they know that Jack will be more stunned than they were.
To stop a ghost from killing again, Dean is willing to make the ultimate sacrifice.
After reading about a young boy found on the side of highway that would only speak the word "monster" in Grand Junction, Colorado, Sam thinks that they have a case. He suggests that they leave Jack behind for this one as he has Sam's collection of nerdy fantasy movies to keep him occupied.
Shape shifting ex-boyfriends from hell.
After Dean finds a case in Madison, Wisconsin, he is ready to hit the road but Sam wants o bring Jack with them. Dean isn't happy about that idea but Sam convinces him to give the kid a chance. Surprisingly, it's Jack that needs the real convincing.
When a monster feeds on the brains of psychics, an old friend will put herself in harm's way to protect her family.
After a psychic is found dead inside of her shop, Dean gets a call from Missouri Moseley to meet in Omaha, Nebraska. Sam suggests that they send Jody to handle it while they watch Jack but Dean refuses to babysit and let Jody take all of the risk.
A road trip with the devil's son is just about as complicated as you would expect.
After the events of last week, the Winchesters and Jack are headed back to the bunker in the impala. Dean still doesn't trust Jack but Sam thinks that he might be taking the loss of Castiel and Mary quite hard.
The Devil has a son and his name is Jack.
After walking into the room with the newly born, naked, young adult Nephilim, Sam is kinda terrified. He asks Sam if he is his father but doesn't get the answer he was hoping for. Then Dean runs into the room and shoots the Nephilim. The result is the Winchester brother waking up hours later with no sign of the Nephilim known as Jack.
From good to bad, from bad to worse.
After taking the life of another hunter, Mary Winchester's next target is none other than Sheriff Jody Mills. Meanwhile in the bunker, time is running out for Sam, Dean and Tony after being sealed in by Ketch. At the rate they are going, they might have three days of air before they die.
Mary Campbell: natural born killer.
After arriving at Mary's hotel, the Winchesters find it empty and their mother nowhere to be found. Moments later, Sam gets a call from Sheriff Jody telling him that Eileen Leahy was found dead in South Carolina after an apparent animal attack in an area that has never been known for it to occur.
We don't always do the right thing for the ones we love.
Since there mother hasn't checked in for more than a day, Alicia and Max Banes call Mary Winchester looking for help but instead, they get Sam and Dean. Dean is reluctant but Sam stresses that they have no leads on Castiel and may as well try to occupy themselves while they wait.
Ok, this girl has lost her mind.
After weeks without calling or texting, Castiel saunters into the bunker – much to the shock of Sam and Dean. Sam is happy to see him return but Dean has some harsh words for his angelic friend that made so little effort to get in touch with them. Castiel accepts the blame and admits that he was with the angels in heaven but they have nothing.