Supported by the National Geographic Society, the world's eminent blue whale scientists embark on a revolutionary mission: They'll find, identify, and tag California blue whales, use the DNA samples to confirm the sex of individual whales, then rejoin the massive creatures' stunning migration when they collect at a chimera known as the Costa Rica Dome.
Tom Selleck
Narrator (voice)Eric Olson
Self - ScrippsBruce Matz
Himself - Marine Mammal InstituteScott Baker
Himself - Whale GeneticistDarlene Kenton
Herself - Woods HleGisli Vikingson
SelfStephen R. Palumbi
Self - Whale GeneticistJohn Calambokidis
Himself - Cascadia Research