
With over 800 episodes and a huge number of characters, it’s not surprising that some familiar faces from The Simpsons disappear for long periods. The show’s incredible length – it’s currently the longest-running scripted primetime TV series in American history as of 2026 – means many supporting characters come and go.
The show doesn’t have enough time to fully develop all of its characters, and its main focus on the Simpson family means even great supporting characters don’t get a lot of screen time. This is why some beloved characters appear infrequently, and why certain celebrity guest voices only appeared in one episode.
Mona Simpson

Don’t give up on characters even if they’re absent for a long time! The show often circles back to their stories eventually. A good example is Homer Simpson’s mother. While her history was mentioned early in the series, viewers didn’t actually see her until the seventh season, in the episode “Mother Simpson.”
This unusually touching episode concluded with Homer’s mother fleeing from the police yet again, leaving a heartbroken Homer sitting on his car, gazing at the stars. It’s considered one of the most emotionally powerful moments in the show’s history. Surprisingly, this beloved supporting character reappeared eight years later in season 15’s “My Mother the Carjacker,” and her story finally concluded with her death in season 19’s “Mona Leaves-a,” four years after that.
Lurleen Lumpkin

It’s common for big celebrities to make cameos on The Simpsons now, but when the show first started, landing a famous guest star like Dustin Hoffman or Michael Jackson was a real coup. One of those early appearances was by Beverly D’Angelo, known for the National Lampoon’s Vacation movies. She played the infatuated country singer Lurleen Lumpkin in season 3, episode 19, titled “Colonel Homer.”
Homer once briefly considered cheating on Marge while working as the manager for a singer named Lurleen, but ultimately chose to stay with Marge and quit the job. Sixteen years later, Lurleen reappeared in Springfield, down on her luck and working at Moe’s Tavern to pay off a large tax debt from her singing career. The Simpsons helped her get back on track, and by the end of the episode, she was starting a new career as an opening act for The Dixie Chicks.
Bleeding Gums Murphy

Look, as a longtime Simpsons fan, I’ve noticed they often revisit old plotlines, and it rarely feels fresh. But there’s one instance that really stands out. Everyone remembers the episode where Lisa gets depressed and connects with the blues musician, Bleeding Gums Murphy – “Moaning Lisa” from Season 1 is a classic. But honestly, it was when Bleeding Gums Murphy unexpectedly showed up again in Season 6’s “’Round Springfield” that really blew me away. That was a genuinely powerful and memorable moment for the show.
Lisa unexpectedly runs into Bleeding Gums Murphy at the hospital and discovers he’s seriously ill and doesn’t have much to his name. In a truly heartwarming scene, Bart and Lisa team up to share Murphy’s music with everyone in Springfield after he passes away. Though it had been a while since he’d appeared on the show, this return confirmed that Bleeding Gums Murphy was one of The Simpsons’ most memorable and beloved supporting characters.
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2026-06-07 20:17