VIDEO : The Big Bang Theory Says Goodbye

LOS ANGELES (Reuters) - Sheldon and Amy won their Nobel Prize and the elevator was finally fixed in a sentimental finale on Thursday to television comedy series ?The Big Bang Theory? that left fans in tears of delight. Penny got pregnant, Amy got a makeover and Sheldon apologized to his long-suffering friends ?for not being the friend you deserve? as the most-watched comedy on U.S. television ended its 12-year run. ?The Big Bang Theory,? the show about four brilliant but socially inept scientists that made geeks and comic book nerds pop culture cool, began in 2007 and went on to win 10 Emmy awards, four of them for Jim Parsons as quirky theoretical physicist Sheldon Cooper.