The prime time CBS television series Dallas ran from April
2, 1978, to May 3, 1991.

Although the soap’s audience had consistently declined since the
"Who Done It" episode of 1980, the series finale of Dallas, garnered
33 million viewers and a 22 household rating from 9-11pm on May 3,
1991, making its way into the country’s 14th most watched television
series finale.

Dallas originally aired on Saturday nights when it debuted as a regular
series. Within a month, the show was moved to Sunday nights, where
it would stay until halfway through the season, when it took a Friday-
night slot. Dallas remained on Fridays until the show ended in 1991

Larry Martin Hagman (September 21, 1931 – November 23, 2012)