The 1979-1980 season ended with the show's anti-hero, J.R. Ewing, being shot (in the episode "A House Divided"). Viewers had to wait all summer (and most of the fall due to a Hollywood actors' strike) to learn whether J.R. would survive, and which of his many enemies was responsible. "Who Done It?" aired on November 21, 1980, with the revelation that Sue Ellen's sister Kristin, shot him in a fit of anger. It was one of the highest-rated episodes of a TV show ever aired. The great success of this stunt helped usher in the practice of ending a television season with a big cliffhanger. This entered into United States popular culture, with t-shirts printed with such references as "Who Shot J.R.?" and "I Shot J.R.!" being common over the summer.