S2, E11: Margo (guest star Julie Warner), a young housewife on fertility medication, is brought to Princeton Plainsboro Hospital when her inexplicable muscle flailing causes her to crash her car. As Margo’s symptoms progress, House and the team think she might have Huntington’s disease but when Margo descends into paranoia, they must dig deeper to figure out the cause of her illness - and the team is once again reminded that everybody lies.