Before "Three Stories," House’s disability was treated simply as a character quirk that fueled his misanthropy. The penultimate episode recontextualizes his entire persona. The audience learns that House chose to risk his life to keep his leg, and Stacy's intervention—choosing a middle ground that left him in chronic pain—destroyed his capacity to trust loved ones.

ControlThe introduction of billionaire Edward Vogler, who becomes the hospital's chairman and House’s primary antagonist for the rest of the season.

A woman returns from a jogging trip and lapses into a coma. Diagnosis: African Trypanosomiasis (sleeping sickness).

A college student collapses after sex, experiencing rapid, unexplained multi-organ failure.