Chou-Young is seen when he is being interviewed by the doctors, who are trying to find out what pesticides he may have been exposed to. However, he explains that they keep no plants except a bamboo tree and have no pesticides in their home.
Later, Gregory House is trying to confirm that both patients were poisoned by tainted laundry detergent. Chou-Young tells House that his son doesn't even know how to use the washer. However, when House realizes the clothes were unwashed, he realizes that both patients were wearing new clothes.