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In Vietnam, Forrest treks through the world's largest cave searching for the Saola in a hidden oasis. This exotic species was only recently discovered, but rumors swirl that "The Asian Unicorn" might already be extinct.
Forrest is determined to find out if the famously reclusive Ivory Billed Woodpecker still exists. The alligator and poisonous snake infested swamps of Louisiana make for a challenging mission, but he is prepared for anything.
The Southern Rocky Mountain wolf hasn't been seen in almost 80 years, but recent cattle attacks spark the possibility that it still exists. Trekking high into the Sierras, Forrest is determined to bring it out of hiding.