Humpback Whales takes crowds and the Kingdom of Tonga for a close up look at these whales convey, sing, play, feed and look after their own young. Humpbacks were driven to extinction 50 decades before, but now are building a recovery. Combine a team of researchers as they explore why is humpbacks the most acrobatic of all whales, why only the guys sing, and exactly why these intelligent 50 Foot, 48-ton creatures migrate than 6,000 miles round-trip annually.