The season's first two episodes, "Bart of Darkness" and "Lisa's Rival", were held over from the previous season, as production was delayed because of the 1994 Northridge earthquake. "A Star Is Burns" caused some controversy among the staff with series creator Matt Groening removing his name from the episode's credits as he saw it as blatant advertising for "The Critic", which had moved from ABC to Fox for its second season and was scheduled to follow "The Simpsons". The season finale "Who Shot Mr. Burns?" (which aired in two parts, the second acting as the following season's premiere) came from Groening, who had wanted to do an episode in which Mr. Burns was shot, which could be used as a publicity stunt. The writers decided to write the episode in two parts with a mystery that could be used in a contest. It was important for them to design a mystery that had clues, took advantage of freeze frame technology, and was structured around one character who seemed the obvious culprit.