It's winter and it's dark and too cold to play outside. The squirrels wonder what Duggee is up to - he seems to be looking through a long stick out of the window. Duggee explains that it's a telescope, and he's looking at things far away in space. The squirrels are keen to have a go too, but first Duggee tells them about the Solar System, and in order to help him they must all dress up as planets