May 31, 2016

The highest rated single television broadcast in U.S. history is the 150-minute long final episode of M*A*S*H (the country's first ever and, to date only, regular primetime television series to be watched by more than 100 million American viewers for an episode), transmitted on primetime by CBS on 28 February 1983, viewed at a peak conclusion by 125 million American viewers (or 60.2% of American households and at least 77% of the total U.S. television viewers). It still stands as the most watched finale of any television series.