Yellow Fever

Sam and Dean discover a Colorado small town's darkest secret as a wave of people fall prey to a "ghost sickness" that induces fear, paranoia, and ultimately a fatal heart attack. Sam and Bobby must figure out the cause and cure of the sickness when Dean himself falls prey to it.

Season 4 | Episode 6

Jared Padalecki

Sam Winchester

Jensen Ackles

Dean Winchester

Misha Collins