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.

Trivia

 * This is the first season to feature William Healy as the voice of Arthur, taking over from Drew Adkins. This is also the first season to feature Max Friedman Cole as the voice of Brian. Although he shared his role with Siam Yu, who has been voicing Brian since Season 16, due to his voice maturing in this season.
 * This is also the last season to feature Siam Yu as the voice of Brian.
 * This is the first season that Andrew Dayton does the voice of D.W.
 * This is also the first season where Christian Distefano voices James. Distefano would later become the new voice actor of D.W. for Seasons 20-21, succeeding Andrew Dayton.