Ends 5.35.
Arthur A New piano teacher fills
Arthur with doubt and Buster's sweet tooth causes a crisis.
4.10 50/50 Pupils from Harper Green
School in Bolton compete with Whickham School from Newcastle upon Tyne in the school challenge. Featuring Robbie Williams.
Repeated tomorrow at 7am on BBC2
Featured in this term's issue of Smart TV magazine: available from WHSmith; or order on 01795 4.35 Ace Lightning Mark tries to download new superpowers for Ace from his computer
5.00 The Really Wild Show Michaela
Strachan finds out why baboons are a nuisance in South Africa, Nick Baker heads for Borneo's mangroves to find a monkey with a big nose, and Eils Hewitt is a party entertainer for some chimps.
5.25 Newsround