Episode Name: Euphoria (1)
Episode Overview: When a police officer with a gunshot wound to the head and uncontrollable laughter is admitted, House and the team are baffled. When Foreman begins showing the same symptoms, they race to determine the cause of the illness before Foreman's condition takes the same path.
Episode Number: 20
Episode Season: 2
Episode First Aired: 2006-05-02