Sperm Whales Back from the Abyss (S15E01)

Wildlife film about sperm whales, revealing the secret lives led by these often misunderstood ocean giants. Although immortalised by Moby Dick as fearsome beasts of the sea, they are actually shy creatures, and cameraman Rick Rosenthal needed patience and persistence to film them at close quarters. They turn out to be efficient hunters with a close family network involving sophisticated and vocal social lives. (BBC)