"The Simpsons," created by Matt Groening, aired its 636th episode on April 29, 2018, surpassing "Gunsmoke" as the longest-running scripted prime-time show in the United States. "Gunsmoke" aired a total of 635 episodes from 1955 to 1975.
"The Simpsons" first premiered on December 17, 1989, and has since become a cultural phenomenon, known for its satirical humor, memorable characters, and sharp social commentary. The show follows the lives of the Simpson family—Homer, Marge, Bart, Lisa, and Maggie—in the fictional town of Springfield.
Since breaking the record, "The Simpsons" has continued to air new episodes, further solidifying its place in television history.