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 season is the first one to consist of only 10 episodes.
 * This season is the first one to feature Oliver Grainger as the voice of D.W., and the last one to feature Luke Reid as the voice of the Brain. His voice was even lower than in Season 3.
 * This season is the last one to feature the work of head writers Joe Fallon and Ken Scarborough.