The Simpsons has just become the longest-running scripted series, after Fox just renewed the cartoon for a record breaking 30th season. Though the show is currently on its 28th season, it will live for at least two more, which takes the crown from Gunsmoke for the most episodes in a series. The latter had 635 episodes, while The Simpsons will have a total of 669 episodes by the end of the 30th season.