PBS children’s show ‘Arthur’ to end after record 25 seasons. “Arthur,” the longest-running children’s cartoon in U.S. TV history, is slated to end next year after its upcoming 25th season. It looks like everyone’s favorite anthropomorphic aardvark is finally retiring his iconic yellow sweater. "Arthur," the longest-running children’s cartoon in U.S. TV history, is slated to end next year after its upcoming 25th season. "In the winter of 2022, the 25th and final season of ‘Arthur’ will debut," Carol Greenwald, the PBS series’ executive producer, told IGN in an email. This show has impacted so many lives and we hate to see it go but are happy it has had such a long and amazing run!!! Check out the link to read more about this.