Season 4

Season 4 of Arthur premiered on September 6, 1999 on PBS. From this point onward, only 10 episodes were produced per season.

Trivia

 * This is the first season to consist of only 10 episodes.
 * This is the first season to feature Oliver Grainger as the voice of D.W., and the final season to feature Luke Reid as the voice of The Brain.
 * This is the final season to feature the work of head writers Joe Fallon and Ken Scarborough.