Supernatural (TV series)/Recap/S04/E06 Yellow Fever

Season 4, Episode 6:

Yellow Fever
Dean contracts a ghost sickness that makes him terrified of everything, so Sam and Bobby go after the ghost who is causing it.

Tropes

 * The Cast Showoff -- Jim Beaver is fluent in Japanese
 * The End or Is It: Sam's eyes flash yellow one last time in Yellow Fever, AFTER Dean is supposed to be cured.
 * Noodle Incident: When he's ranting about how insane their lives are, Dean mentions a truckstop waitress with a bizarre rash.
 * The Stinger -- Jensen Ackles lip syncing "Eye of The Tiger"