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.
Scott Baker
as Himself - Whale Geneticist
John Calambokidis
as Himself - Cascadia Research
Darlene Kenton
as Herself - Woods Hle
Bruce Matz
as Himself - Marine Mammal Institute
Tom Selleck
as Narrator (voice)
Eric Olson
as Self - Scripps
Stephen R. Palumbi
as Self - Whale Geneticist
Gisli Vikingson
as Self
