The Simpsons is gearing up for a historic TV moment as it approaches its 800th episode, and the long-running animated sitcom is celebrating with some big changes. The milestone installment, titled Irrational Treasure, will debut a special new logo, a fresh take on the iconic theme song, and an all-star lineup of guest voices tied to the episode’s Pennsylvania setting.
Currently in the middle of season 37, The Simpsons has been a fixture of television since it first premiered on Fox in 1989. Created by Matt Groening, the series has spent decades redefining what an animated sitcom can be, and the upcoming 800th episode looks to honor that legacy while trying a few new tricks.
What to expect from The Simpsons’ 800th episode, Irrational Treasure
Irrational Treasure will see the Simpson family head to Pennsylvania, with much of the story taking place in Philadelphia. The episode’s official logline promises a mix of dog show drama and historical conspiracy:
Marge’s efforts to get Santa’s Little Helper into better shape push her into the world of canine agility competitions and ultimately land the family at the National Dog Show in Philadelphia. While there, Marge and Homer — along with the family dog — are pulled into a historical mystery that echoes the high-stakes adventure of the National Treasure movies.
This blend of family comedy, pop culture parody, and mystery is classic Simpsons territory, making it a fitting story choice for such a major milestone.
Pennsylvania-themed guest stars join the Springfield chaos
The 800th episode will lean into its Pennsylvania setting with a stacked roster of guest stars who either hail from or are associated with the state.
Kevin Bacon, one of Pennsylvania’s most famous exports, will voice a concierge the family encounters on their trip. Quinta Brunson, another Philadelphia native and the creator and star of Abbott Elementary, will voice a character named Adrienne.
The episode will also include a reunion of voices from The Pitt, with Noah Wyle, Taylor Dearden, and Katherine LaNasa joining the cast. Wyle will play a doctor, LaNasa a nurse, and Dearden an intern, continuing The Simpsons’ long tradition of balancing grounded character work with high-concept storytelling and meta casting.
Questlove, the legendary musician, producer, and Roots drummer, will step in as a tour guide, adding another Philly icon to the mix.
A new Simpsons logo with Krusty the Clown front and center
To commemorate hitting 800 episodes, The Simpsons is rolling out a special logo for Irrational Treasure. This celebratory branding puts Krusty the Clown in the spotlight, tying into the show’s history of using its own fictional celebrities as cultural touchpoints.
The milestone logo continues a pattern for The Simpsons, which has often updated its visuals and special branding for anniversaries and landmark events while keeping its core identity intact. By highlighting a legacy character like Krusty, the series underscores how deeply its creations have embedded themselves in pop culture.
Boyz II Men reimagines The Simpsons theme song
Few TV theme songs are as recognizable as The Simpsons opening music, but for the 800th episode, the show is embracing something new. The episode will feature a special version of the opening and closing theme, performed by Boyz II Men.
The Philadelphia-born R&B group will perform a vocal rendition of the title theme during the opening, putting a soulful, hometown spin on the familiar tune just as the family travels to their city. A new version of the closing music will also play over the end credits, giving the entire episode a unique sonic identity.
In a series known for its memorable couch gags and evolving opening sequences, this Boyz II Men collaboration stands out as one of the more notable twists on the classic theme, and it neatly ties into the episode’s Pennsylvania focus.
When and where to watch The Simpsons’ 800th episode
Irrational Treasure will air as the season 37 finale, capping off a 15-episode run that has leaned heavily into star-studded guest casting and timely storytelling. The milestone episode is scheduled to air on Sunday, February 15, at 8 p.m. ET/PT on Fox.
Season 37 itself premiered on September 27, 2025, and has continued the show’s tradition of pairing its core Springfield ensemble with high-profile guest stars from across film, television, comedy, and music.
Season 37’s impressive guest star lineup
Beyond the 800th episode, season 37 has been packed with notable guest appearances. The season has featured:
Viola Davis
Lindsay Lohan
Michael Keaton
Idris Elba
Albert Brooks
Kieran Culkin
Kerry Washington
Brendan Gleeson
Domhnall Gleeson
Johnny Knoxville
Jon Lovitz
Stephanie Hsu
Cole Escola
Julianne Moore
These names reinforce how The Simpsons remains a destination for acclaimed actors and performers, even this far into its run. Between dramatic heavyweights, Oscar winners, cult favorites, and comedy veterans, season 37 has showcased how flexible the show’s world is when it comes to integrating new characters and personalities.
The Simpsons’ future: Season 38 and beyond
While the 800th episode is a major milestone, it is far from the end of the road for Springfield. The Simpsons season 38 was officially confirmed in April of last year and is expected to air this fall with another 15-episode order. An exact premiere date has yet to be announced.
Fox has already committed to the animated sitcom through at least season 40, with each of the upcoming seasons sticking to the newer 15-episode standard. Even with that more compact episode count, the show is steadily marching toward yet another landmark: 900 episodes.
Though season 40 itself will not be enough to push the series to that next major numerical milestone, the ongoing renewals and continued cultural relevance make it easy to imagine The Simpsons crossing 900 episodes in the years to come.
Why the 800th episode matters
Reaching 800 episodes is almost unheard of in modern television, especially for a scripted series. The Simpsons has survived massive shifts in viewing habits, the rise of streaming, and changing cultural landscapes, all while managing to reinvent itself just enough to stay current without abandoning its roots.
The Irrational Treasure episode encapsulates that balance. It pairs classic Simpsons elements — Marge’s nurturing yet obsessive tendencies, Homer’s hapless involvement in something much bigger than himself, and Santa’s Little Helper at the heart of the plot — with new twists, such as a fresh take on the theme music and a guest cast deeply rooted in the episode’s setting.
By updating its logo for the occasion, remixing its legendary theme with Boyz II Men, and centering a story that taps into both Americana and modern fandom for mystery-adventure tales, The Simpsons is embracing its legacy while signaling that it still has new stories to tell.
As The Simpsons heads into its 800th episode and looks ahead to seasons 38, 39, and 40, it remains one of television’s most enduring pillars of animated comedy. Whether you’ve been watching since 1989 or you’ve jumped in more recently, this milestone episode is designed as a celebration of everything that has kept the show going for decades.
Stay tuned to BlueBoxNERD to get the latest from nerd culture.