"Both Sides Now" is the twenty-fourth episode and season finale of the fifth season of House. It originally aired on May 11, 2009. Plot House wakes up at his apartment after spending the night with Cuddy. He discovers that she has left her lipstick on his bathroom counter, as well as on his cheek. House pockets the lipstick, and goes to work in a cheerful mood and a remarkable lack of pain. House and the team are intrigued by Scott (Ashton Holmes), a man who has undergone a corpus callosotomy procedure to treat epilepsy. The procedure left him with independently functioning left and right brain hemispheres and two distinct personalities, resulting in loss of conscious control over some of his actions, including those of his left hand, a condition known as alien hand syndrome. As the two sides of Scott's brain struggle for dominance, his warring personalities make it increasingly difficult for the team to figure out what is causing the problem. The team is forced to use some unusual methods to get him to cooperate with their testing. Meanwhile, Cuddy tells House that their relationship must be that of employer and employee. House tells Wilson that he kicked his drug habit and had sex with Cuddy; Wilson advises that he talk to her, advice which House ignores. Instead he begins a campaign to annoy and provoke her, an attempt to break through her composure. When, as part of this plan, House refuses to make his scheduled appearances in the clinic, Cuddy begins referring patients to see House in his private office, specifically an annoying elderly man named Eugene Schwartz (guest star Carl Reiner) whose wife is bothered by the odd "squawking" noises he makes. To Chase's complaints about his relationship crisis with Cameron, Taub responds by talking about toxic chemicals of male fruit flies. Meanwhile, Cameron turns to House for advice, who convinces her to concede to Chase. Chase gets a new point of view of her motives and concedes to her in turn. Their wedding plans are revived. In a final attempt to provoke Cuddy into examining her true feelings for him, House announces to everyone in the main lobby of the hospital that the two had sex. Cuddy responds by confronting him and then firing him after he suggests that they move in together. Cuddy storms off but before House can do anything else, Eugene Schwartz approaches