The beautiful cheetah is still being killed illegally for its highly prized coat and on the verge of extinction. Marlin Perkins joins in a search for a radio-telemetry-collared male to aid in preserving these animals and their habitat.

Marlin joins a scientific team in the remote Elburz Mountain region of northern Iran to study the habitat of the elusive Iranian ibex.

Marlin observes the cranes during the spring migration on one small area of the Platte River near Kearney, Nebraska.

Wild Kingdom attempts to determine the habitat needs of the polar bear in an area where development of oil and natural gas resources may interfere with his natural habitat.

Marlin joins a biologist on a boat moving up the coastal rivers of northern Australia to observe the saltwater crocodiles, which live there.

Marlin joins Dr. Ted Bank, II, in an underwater adventure searching the ancient undersea beaches of the Bering Sea land bridges of prehistoric times looking for evidence of the past habitation of man.

The most venomous vertebrate animals on earth - the sea snakes - are studied in this exciting research undertaken by Dr. Harold Heatwole, American herpetologist.

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Efforts to save the African elephant from extinction near Mount Kilimanjaro.

Dr. Nelson, an expert on the behavior of sharks and marine mammals, researches on Eniwetok Island.

Concentrating on the appearance of young animals in the spring, this episode looks in on a fascinating array of wildlife near Custer Park in South Dakota.