Dr. Cox cleverly turns a hunt for the disease, which is killing Elliot's patient, into a medieval battle against an evil monster. All the crew feature - Janitor as the giant, Kelso the evil demon who controls the land, Ted as a hunchback, Elliot as the Princess and J.D. as the village idiot. Todd makes an appearance as a fairy, while Turk and Carla share a body as a two-headed witch. (There's an excellent comic moment when the two heads fall out and Carla punches their body in "their" one remaining nut.) Cox himself is, naturally, the knight hero, who rides in to save the day - though it's actually J.D. who provides the breakthrough diagnosis.
Cox's observations of his colleagues are cruel, profane and very funny - but also astute. He notes J.D. and Elliot's growing closeness and leaves the viewer to believe that the pair are very close to getting together again.