In the last of this captivating series, Gordon and the team of scientists continue to make extraordinary discoveries about the lives of some of the planet's most fascinating species.In the heart of the Atlantic Gordon joins a team of scientists who are keen to learn why a large number of devil rays, or ‘fish with wings', gather near the Azores archipelago every summer. The team deploys specially designed cameras which are towed behind the rays and can survive the crushing ocean depths. The cameras film breath-taking scenes of unborn ray pups kicking inside their mothers - a sign that this gathering might be a breeding ground for these mysterious ocean giants.