What was the title of the final episode of Arthur?

The final episode of Arthur was titled “All Grown Up.”

The episode served as the series finale after Arthur’s 25-season run. It jumps forward into the future, showing Arthur and his friends as adults and revealing how their lives developed after childhood. The story also gives Arthur a new artistic direction and reflects on the relationships that shaped the series.

“All Grown Up” is sometimes confused with a rumored title such as “Arthur’s Farewell,” but those alternatives are not the official episode title. The finale aired on February 21, 2022, although production of the final season had been completed by the end of 2019.

A notable detail is that Michael Yarmush, Arthur’s original television voice actor, returned to voice Arthur as an adult. Yarmush had voiced Arthur during the show’s earliest seasons, making his return a deliberate callback to the program’s beginnings. The finale therefore functions both as a time jump and as a closing tribute to the show’s long history.