The presenters of this episode of Talkdust are TD Dang and Alex Bolton. Music and editing by Matthew Scroggs, and announcements by Tom Rivlin. In this episode:

• TD and Alex talk about Royal Institution masterclasses and Maths Fest, and encourage you use Google to find this video.
• TD interviews members of the Chalkdust team during Chalky Saturday.
• Alex tells TD about the chessboard puzzles that his Royal Institution masterclass is based on.
• TD and Alex play a game in which they try to describe mathematical words to each other and take the top position on the leaderboard.