Lucille Ball and her husband Desi Arnaz revolutionized TV with the creation and production of their show, I Love Lucy, on CBS. They were the first to use a multi-camera format before a studio audience to shoot the popular situation comedy or sitcom. And they unknowingly invented the rerun during Lucy's pregnancy. In an effort to give her some time off, previous episodes of I Love Lucy were broadcast in place of original episodes. The studio they formed, Desilu, went on to produce some of TV's most iconic shows in TV history, including Star Trek and The Untouchables.