In the Season 4 Simpsons episode, "The Front," Bart and Lisa read a letter that is implied to have a swear word.
In The Simpsons episode "Cape Feare," an Itchy and Scratchy interlude turns deadly with a suicide joke that crossed the line.
Since its debut in the late 80s, the Simpsons has been, if not a household staple, then at least a TV staple. While these ...