Moaning Lisa” is the sixth episode of Season 1. It aired on February 11, 1990. The episode was written by Al Jean and Mike Reiss and directed by Wes Archer. It features the first appearance of Bleeding Gums Murphy.
Lisa develops the blues, which is noticable to the people around her. She has a note sent home by school, but her parents cannot cheer her up. That night, she hears jazz music in the distance and sneaks out to follow it, to discover that it is being played by Bleeding Gums Murphy. He teaches her how to express her sadness on the saxophone, and she is happier again.