Richard feels like dancing and the Tweenies are taking ballet lessons.

Dynamo and Slomo learn about putting things in the right order.

Sally Gray helps Voyager to understand how science has changed lives with a look at lightning.

Rory and the volunteers are investigating the London Stone.

Adrian Woolfson shows Quentin how eggs, in particular ostrich eggs, start life from the largest single cell.

Sally Gray shows the sights of Berlin to a mystery VIP and Matthew Voss discusses German cakes.

Peter Curran traces the origins of pop art.