Who played Dr. Gregory House in 'House'?

Who played Carrie Bradshaw in 'Sex and the City'? In 'Grey's Anatomy', in which city is the hospital located? In 'ER', in which city is the hospital located? In 'House', what is Dr. Gregory House's medical specialty? Which TV network originally aired 'Friends'? Which TV network originally aired 'Seinfeld'? Which TV network originally aired 'The Simpsons'? Which TV network originally aired 'Breaking Bad'?