Arthur and the Haunted Tree House

Arthur and the Haunted Treehouse is a one-hour TV special, due to air in 2017.

Trivia

 * This will be the first one-hour special since Arthur - It's Only Rock 'n' Roll.
 * It will be one of two hour-long specials produced as part of the Oasis Animation production deal (alongside Seasons 20 and 21).
 * The title was confirmed in press releases for the launch of the PBS Kids 24/7 Channel.