John Ritter died on September 11, 2003, after collapsing on the set of his sitcom "8 Simple Rules." He was 54.
Twenty-plus years later, the details of that afternoon still circulate online like a wound that never quite closed.
What makes the story stick isn't just the suddenness.
It's that Ritter was in the middle of a scene when it happened, surrounded by castmates who thought, at first, that he was doing a bit.
A stagger or a pratfall could easily read as a joke.
Ritter had an aortic dissection, a tear in the body's main artery.
He was rushed to a hospital near the studio and pronounced dead that evening.
The cast and crew learned the news in real time, and the show's future hung in the balance for weeks.
The industry response was immediate and enormous.
Ritter had spent decades as one of Hollywood's most genuinely liked actors, from "Three's Company" in the late '70s through a steady run of film and TV work.
His "Three's Company" costar Suzanne Somers publicly mourned him.
So did basically everyone else who had ever shared a soundstage with him.
ABC made a call that still gets debated: rather than cancel "8 Simple Rules," the network wrote Ritter's death into the show.
The season premiere became a grief episode, with his character Paul Hennessy dying off-screen and the family — played by Katey Sagal, Kaley Cuoco, Amy Davidson, and Martin Spanjers — processing the loss.
Viewers watched the actors cry, and many suspected some of those tears weren't acting.
Some called it a brave, honest way to say goodbye.
Others thought it was too soon, too raw, and maybe a little exploitative.
Either way, it's now studied as one of the strangest and most emotionally complicated chapters in sitcom history.
The show limped on for another season with new cast members before getting canceled in 2005.
Cuoco went on to "The Big Bang Theory" and became a superstar, but she has repeatedly said Ritter's death shaped how she thinks about the business and about mortality.
Ritter's family also turned the loss into advocacy.
His widow, Amy Yasbeck, and his children — including actor Jason Ritter — have spent years raising awareness about aortic dissection and the genetic condition that can cause it.
The John Ritter Foundation has pushed for better screening and research, work that has plausibly saved lives.
Online, the anniversary posts roll around every September.
Clips of Ritter doing something goofy resurface.
Fans who weren't alive when "Three's Company" aired discover him through their parents' streaming queues.
And every so often, someone posts the timeline of that final day, and the replies fill up with people saying they had no idea it happened like that.
That's the strange afterlife of a beloved TV star: you become a story people tell each other, over and over, mostly to remind themselves that the funny ones don't always get to stick around.
Our take: Ritter's legacy is a rare case where tragedy didn't erase the joy — it just made people hold onto it a little tighter.
The foundation work is the part that matters most, and it deserves more attention than the grisly details ever will.
Final Thoughts
If you only know him from one clip, go watch a full episode.