Episode list

Follow François Sarana and his diving team as he swims with a pod of sperm whales and samples one's excrement. Then watch a mother humpback whale train her calf. A romanticized narrative accompanies the extensive photography of both groups though with limited scientific information.

François visits the Dolphin Communications Project in the Bahamas to observe dolphins using echolocation for crater feeding. He confers with their researches and others in Key Largo and Mexico to review the current understanding of how dolphins communicate with one another. More and more researchers are questioning any similarities between human and dolphin language, even whether the concept of word has meaning in the dolphin language.

François visits Argentina to visit colleagues who study the social structure of orcas. There he observes them training their young which practice the skills the group has developed for seal hunting specific to their environment. Once a kill is made the orcas share the catch with one another. The narrative speculatively extends this behavior to other orca clans and species of cetaceans,