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Peter and Dr. Rae are on their biggest adventure yet with the largest fish in the ocean: whale sharks; Peter helps researchers gather data about whale shark health; Dr. Rae helps scientists monitor whale sharks at the U.S.'s largest aquarium.

Mutual of Omaha's Wild Kingdom Protecting the Wild

The Biggest Fish on Earth

Dr. Rae and Peter connect with three animal species suffering from life-threatening injuries; Dr. Rae meets a team in Central America working to save sloths; Peter and Dr. Rae uncover threats to North Atlantic right whales and Florida manatees.

Injured But Not Out

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Peter and Dr. Rae travel to Cape Canaveral, Fla., to help save critically endangered sawfish; Peter joins researchers monitoring wild sawfish and tracking their migration; Peter and Dr. Rae have a close-up encounter with sawfish in the Bahamas.

The Mysterious World of Sawfish

Peter and Dr. Rae unlock the wild secrets of North America's Great Lakes, as they participate in a survey to monitor sturgeon populations, help biologists fight against a wave of invasive species and discover the tiny but mighty piping plovers.

Secrets of the Great Lakes

Dr. Rae and Peter connect with a few of the continent's most wild and incredible babies, including orphaned black bear cubs at New Hampshire's Kilham Bear Center, elusive baby ocelots in Texas and baby sloths rescued by conservationists in Panama.

Wild Beginnings

Manatees are massive water-bound herbivores whose wild numbers have dwindled to a breaking point; Peter learns about a program pairing orphaned manatee babies with surrogate moms; Dr. Rae helps release rescued manatees back to the wild in Florida.

Gentle Giants

Dr. Rae and Peter connect with one of North America's cutest and most unknown mammal species: coatis; Peter visits Florida's Brevard Zoo, where biologists are working to increase coatis' numbers; Dr. Rae finds evidence of coatis in unlikely places.

Coati Comeback

Peter and Dr. Rae connect with some amazing reptiles found in very unlikely places; Dr. Rae visits a unique turtle sanctuary in Atlanta, Ga.; Peter visits a Florida nuclear power plant that's become a breeding ground for the American crocodile.

Reptile Rescue

Peter and Dr. Rae connect with the most powerful predator in Central and South America: the harpy eagle; Peter visits raptor sanctuaries in Florida; Dr. Rae travels to Panama, the ancestral home of harpy eagles, to learn their cultural significance.

The Most Powerful Predator in the Sky

Peter and Dr. Rae travel to the remote border between Mexico and the U.S. to uncover the hidden world of ocelots; they team up with researchers to document ocelots' hidden lives and learn how biologists are working to increase the species' numbers.

The Hidden World of Ocelots

Dr. Rae travels to tropical Panama to experience the extremely slow but extraordinary world of sloths; she tours a one-of-a-kind facility dedicated to the rescue and rehabilitation of sloths and meets the dedicated people fighting to save them.

Rescuing the Sloths of Panama

Peter and Dr. Rae embark on a mission to protect the endangered North Atlantic right whale; Peter joins the aerial patrol team tracking whales on their migration, while Dr. Rae visits the New England Aquarium to learn about the threats whales face.

Safe Passage for Whales

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Renowned wildlife experts explore how human activity impacts animal behavior and share how modern science, technology and other conservation techniques can help save North America's imperiled wildlife, one species at a time.

S2 E13 | The Biggest Fish on Earth