Long feared as an object of terror, sharks are gaining a new reputation as a species that is quickly disappearing. Cousteau and team travel to Polynesia and South Africa to explore the role of this keystone species.

The Gray Whale follows the longest, most urban migration route, passing busy cities and ports. The Cousteau team follows the migration of these giants from Baja to the Arctic to investigate their sudden decrease of population.

• 1 disc; 120 minutes
• © 2006