Quite possibly one of the longest running TV shows on right now is Supernatural. Starting in 2005 following brothers, Sam and Dean Winchester, as they hunt down the monsters that bring your nightmares to life. However, they have to look past their differences and focus on the evil that threatens the world. As each season goes on something more sinister threatens the world we live in leaving Sam and Dean, along with Castiel, a fallen angel, occasionally demon Crowley, and father figure Bobby. Nothing seems to stop Supernatural from proceeding on with life as each season is a new adventure.