What's on TV Tonight | May 21
House 7-9pm, FOX. In the series finale, House reflects on his past and looks to his future while treating a patient addicted to drugs.
Clash of the Commercials: U.S.A. vs. the World 9-10pm, CBS. How does our country stack up against the rest of the world in shilling products to the masses.
Lost Girl 9-10pm, SYFY. Bo gets a case from The Morrigan, who asks her to find an artist who's been painting murals of the Dark Fae.