In breathtaking detail, high-definition cameras capture the behaviour of this aquatic favourite. Sea otters were nearly wiped out by the fur trade 200 years ago, with only a handful remaining in remote outposts as a curious relic. But 30 years ago, biologists began resurrecting the species in a living experiment. It worked brilliantly, but with unforeseen consequences. This fascinating story examines a species brought back from extinction and the cost of man’s meddling.