The latest episode of "The Simpsons," season 36's "Stew Lies,' features an opening storyline between Lisa and Bart that wraps up surprisingly fast. Bart tries to drive Lisa crazy by repeating everything she says, committing hard to the bit even after days, weeks, and months have passed. At first, Lisa is annoyed, but she decides to use the opportunity to improve Bart's life. She gets him to learn the saxophone, learn another language, and perform better at school. By the end of the first act, Lisa reads aloud a heartfelt letter to her brother that celebrates their sibling bond, while a moved-to-tears Bart copies along with her. 

It's a storyline so sweet it makes me uncomfortable. (My cold and bitter heart can no longer handle things so pure.) Luckily for the more cynical "Simpsons" fans, this opening Bart/Lisa storyline is quickly scrapped for the main storyline about Homer...