In the episode, Arthur, Francine, Buster, and Muffy discover a “retro” game—it’s like a BuzzFeed quiz meets the board game Trouble—in the depths of the Elwood City Public Library.

Arthur concluded its record-breaking run as the longest-running children’s animated series in history with a final episode depicting the show’s characters as adults. ***Warning Spoiler Ahead*** ...

Muffy is running for mayor of Elwood City, hoping to defeat Mayor Hirsch who is still in office after all these years. D.W. Read Arthur’s little sister D.W. grows up to become a police officer.

For the majority of the series, Arthur alongside his best friends Francine, Buster, Muffy, Binky, and Brain were third grade students under the strict and watchful eyes of Mr. Ratburn, their teacher.

So in “Arthur’s Perfect Christmas,” a holiday special, Francine’s family’s Hanukkah celebration causes her to miss out on her best friend Muffy’s Christmas party.

After 25 seasons, the PBS show Arthur ended its run with a final episode. This finale teases what Arthur, Buster, D.W., and co. are up to as adults.