Jacques Cousteau’s Legacy – Return to the Undersea World On the trail of the most famous oceanographer of the 20th Century, the team spent two years filming on original locations in four different oceans. The film charts how Cousteau’s personality was shaped by his many decades at sea around the globe. He gradually changed from a man who killed sharks in hate and thoughtlessly blew up coral reefs, to a radical environmentalist, a struggle that continues to this day.