Before dying, John tells Dean, if he can't save Sam, he'll have to kill him, should he become evil. The fourth season episode "On the Head of a Pin" reveals that the demon Alastair tortured John in Hell for over a century, with John refusing the demon's offer to stop if he himself would torture someone else.

In Castiel's final moments, he smiles through his tears as the Empty takes both him and Billie, saving Dean. Castiel's final words are "Goodbye, Dean."

Call of Duty 4: Modern Warfare\n\n It's at the top of the tier list for the series' games for a solid reason. The first Modern Warfare revolutionized both the approach taken by COD as well as that taken by just about every other FPS game.

Black Ops Cold War is surprisingly the shortest Call of Duty game at just over 5 hours. Despite its length, it has a memorable campaign with rich and detailed environments.