Approximately 106 million viewers watched the final episode of M*A*S*H in 1983.
The finale, “Goodbye, Farewell and Amen,” aired on CBS on February 28, 1983. Nielsen’s commonly cited estimate is about 105.9 million viewers, which rounds to 106 million when expressed as the whole number requested by the question.
The episode followed the personnel of the 4077th as the Korean War ended and the hospital prepared to close. Its enormous audience made it the most-watched television broadcast in U.S. history for many years. It also remains the most-watched single episode of an American television series, a distinction that is separate from the broader record for any televised event.
Some references report 105.9 million, 105.97 million, or simply 106 million because of rounding conventions. Those figures describe the same historic audience, so 106 is the fair quiz answer. The broadcast also drew an extraordinary 77 percent share of televisions in use at the time.