Nothing says get the tissues out like watching baby animals take their first independent steps in the wild, and that's exactly what's happening in the final episode of The Burrowers. The series draws to a close as summer arrives, and all the young animals are forced to learn to survive outside their homes. Will the badger cubs be independent enough to be released? We'll have to wait and see. Oh, and there's some fascinating research into the expansion and evolution of a rabbit warren too.