Episodes

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, alternating between 9 p.m. and 10 p.m. airings.
The "Who Done It" episode of Dallas that revealed who shot J. R.?, the famous 1980 cliffhanger, received the highest domestic ratings at that point with over 90 million American viewers (representing more than 53% of the U.S. households and 76% of the U.S. television audience for November 21, 1980) tuning in for the answer. The episode surpassed the ratings record of the final episode of The Fugitive, broadcast in August 1967, but the record of Dallas would be broken only by the last episode of M*A*S*H in 1983, falling into the second internationally most watched U.S. television episode, with nearly 360 million viewers in over 57 countries worldwide (by the year 1980) tuning in to see who shot J.R.^[21]
Although the soap's audience had consistently declined since the "Who Done It" episode of 1980, the series finale of Dallas, "Conundrum", garnered 33 million viewers and a 22 household rating from 9-11pm on May 3, 1991, becoming the country's 14th most watched television series finale. Its competition, Manhunter (on NBC), only drew a 9.8 rating.