In the latest episode of "Supernatural," Bobby (Jim Beaver) is poisoned by a "homicidal sandman" with a dream potion that makes Bobby lapse into a deadly coma where he relives his worst nightmare in his mind. Sam (Jared Padalecki) and Dean (Jensen Ackles) learn that Bobby was hunting the death of Dr. Greggs, who died after he mysteriously slipped into a coma.[...] Read more!