The previous finale ended with Dean (and to a lesser extent, Sam) upset with Cas for hiding Jack’s issues before Jack ultimately killed Mary.
Still, there was more conflict than just what the boys are going to have to stab and punch their way out of when Season 15 kicks off.
So, how will that play into Season 15?
Supernatural ended its fourteenth season on a major cliffhanger involving a vengeful God, souls unleashed from Hell, and a horde of zombies rising from their graves to menace the Winchesters and Castiel while Jack lay dead.