Season 18

Season 18 of Arthur premiered on PBS on September 29, 2014 with "The Friend Who Wasn't There/Surprise!". It concluded on September 11, 2015 with "The Pageant Pickle/Some Assembly Required".

The season was first announced on June 21, 2013 and was in production throughout 2013 and 2014. Storyboarding began around early December 2013. It is the third one produced by 9 Story Entertainment. There were 10 episodes in it.

Lydia was going to appear in this season, but the episode "Little Miss Meanie" was made part of season 19 instead.