Although it's still months away from premiering, we know a couple spoilers about season six of Supernatural:
Now, Michael Ausiello of Entertainment Weekly has spilled a major casting rumor.
In his latest spoiler column, the writer says sources have told him veteran actor Mitch Pileggi may return to Supernatural this fall in the recurring role of Sam and Dean’s presumed-dead grandfather. He hasn't appeared on the series since 2008.
Most recently, Pileggi has guest-starred on hits such as Grey's Anatomy and Castle. What might his character's return mean for Supernatural? Theorize away now!