In this episode, we spend a dark and lonely night on the island in the hope of meeting a hawk. But even back gardens can be scary, strange places. We face the fear, and find mysteries high and low. Book mentioned: 'Tracks and Signs of the Birds of Britain and Europe' (2nd ed.) by Roy Brown, John Ferguson, Michael Lawrence and David Lees, 2003, Christopher Helm / A&C Black. Film mentioned: 'The Secret Life of the Sparrowhawk' by Dave Culley, narrated by Chris Packham: sparrowhawk-island.co.uk.