Supernatural -- Yellow Fever
Best part of the whole episode was the Jensen Ackles "Eye of the Tiger" performance after the episode. That better be on the DVDs so I can loop it for a half-hour and soak in the AWESOME.
Other than that, it was fun to see Ackles playing scared, with Sam having to take point.
The Ackles scream was amazing and wonderful and continued the show's progress towards re-equalizing the gender paradigm of the show.
It's too bad that no one on this show has any fun.