We're back in the burrowers as spring arrives and the little 'uns start to grow up fast. Those adorable orphaned badgers have figured out how to communicate with each other, the rabbits are taking their first steps outside, and the wild little water voles are off for their first dip in the water. It's all a bit cute and creepy at the same time. Naturalist Chris Packham turns his attention to the mole, and the team take things a step further by unveiling an excavated abandoned wild rabbit warren that they cast in concrete. It's fascinating stuff.