Who shot John Ross "J.R." Ewing Jr in the American television series "Dallas"?

John Ross "J.R." Ewing Jr., played by Larry Hagman, is a fictional character in the American television series "Dallas", a prime time television soap opera that aired on the Columbia Broadcasting System (CBS) from April 2, 1978, to May 3, 1991, and its spin-offs that ran totally for 14 seasons.

On November 21, 1980, 350 million people around the world tuned in to the popular primetime TV Drama “Dallas” to find out who shot J.R. Ewing, the character fans loved to hate. J.R. had been shot on the season-ending episode the previous March 21, which now stands as one of television’s most famous cliffhangers.

Then, after eight months of widespread media coverage that left America, and the world, wondering “Who shot J.R.?”, the November 21 episode solved the mystery, identifying Kristin Shepard (1979–1981), played by Mary Crosby, J.R.’s wife’s sister, and his former mistress, as the culprit.