Marlin and Stan are in Botswana in southern Africa catching wild cheetahs as part of a conservation project conducted by the University of Pretoria and the National Parks System of South Africa.

Two of the big cats captured in Part I are transported to a compound near Kruger and fitted with identification collars and radio transmitters to aid in studying their movements and habits.

Marlin and Stan help capture and relocate a jaguar that threatens livestock.

Marlin and Stan have captured wild animals in just about every way possible but perhaps the most unusual capture of all takes place in the deep snow of the far north, in pursuit of caribou.

At a bayou in the northern part of Florida, a young bobcat awakens after sunrise and emerges from his den to begin his hunt.

Marlin and Stan challenges the buffalo, "M'Bogo" as the natives call him, as they take part in an unusual research project.

Marlin and Stan plan to join rangers in Rhodesia in using the new system, the cannon net, in capturing lions.

Marlin and Tom Allen join a voyage planned by Marineland of Australia to the Great Barrier Reef, one of the world's natural wonders.

Marlin and Tom Allen explore a giant coral head that juts up from the ocean floor. It is a center of underwater life.

Marlin and Stan travel to Goodparla in Australia to take part in a roundup of water buffalo.

The Agassiz National Wildlife Refuge, northwestern Minnesota, is ideal moose country. Marlin and Stan undertake a study of these big animals.

As the sea cows leave the ocean and swim up the Crystal River in Florida to their breeding grounds, Marlin and Jim help rescue the stranded animals.