In the final episode of the series, all eyes are on the nests at RSPB Arne in Dorset. Will they fledge before the night is over? Chris Packham and Michaela Strachan look back over the series to see who our main cast of characters have been. Megan McCubbin continues to explore the peripheries of the reserve and looks at some of its more intriguing inhabitants. She also finds out how a dedicated team of researchers are doing some radical work to provide homes for tree-roosting bats. Gillian Burke wraps up the series at South Stack on the far reaches of Anglesey, where it’s a hive of activity with nesting sea birds.