Sir David Attenborough reveals spectacular scenes of courting and companionship. Some species need to overcome the challenges of a vast environment just to find a member of the opposite sex. Others find themselves pitched against their neighbors in mass mating aggregations. Some must impress with complex displays. Others build extraordinary structures just to prove their worth. One thing, however, connects them all the drive to succeed at all costs....

Patrick Dykstra is a man who has dedicated his life to his great passion - diving with and filming whales. Over the years, Patrick has learned how whales communicate, how they perceive other creatures in the water, and how they behave in his immediate presence.