Season 20

The twentieth season of premiered on PBS on Monday, October 10, 2016,  with the next three episodes premiering later in the week.

Together with Season 21, there will be fourteen new 30-minute episodes. There will also be two 1-hour specials that are not considered part of either season. One of these is titled Arthur and the Haunted Treehouse.

9 Story Media Group will not be animating the show this season. Instead, WGBH has signed an agreement with Oasis Animation. Production began on September 9, 2015. All work has been completed as of December 2016.

Christian Distefano is the new voice of D.W., replacing Andrew Dayton. Distefano previously voiced James in Season 18.