Despite Dean's directive to forget about looking for a cure for the Mark of Cain, Sam continues to do research. Dean suspects Sam is hiding something but decides to focus on a new murder case where they run into Cole. The three team up and learn a Khan worm is infecting men and turning them into murderers. Unfortunately, the worm makes its way into Cole.
Genres: Drama , Mystery , Sci-Fi & Fantasy
Keywords: angel , apocalypse , bromance , brother-brother-relationship , brothers , dead-mother , demon , demon-hunter , demonic-possession , exorcism , fighting-evil , four-horsemen-of-the-apocalypse , ghost , hopeful , horror , leviathan , monster , on-the-road , paranormal , paranormal-phenomena , purgatory , ressurection , supernatural , witch , gloomy , watch-series-online , dramatic , suspenseful , dark-fantasy , grand