Poison

When a high school student falls victim to a mysterious but lethal poisoning, House and his team jump in to find out what is killing the teen. Suddenly, a second unrelated student is admitted with identical symptoms. With the boys' lives hanging in the balance, House and the team have to connect the dots fast. Meanwhile, an 82-year-old patient has become enamored with House while he helps her figure out the basis of her renewed fascination with her sexual feelings.