Appearing as Series Host

Synopsis from The Disney Channel Magazine:

The Scheme of Things is a half-hour documentary exploring the many wonders of the world of science. Hosted by actor James MacArthur, the program travels the globe observing and recording a wide spectrum of natural and man-made phenomena, which are then presented in an entertaining format, relevant to our everyday lives.
Included are examinations of subjects such as robots, pyrotechnics, energy farms and foods of the future. Also included are special presentations from Epcot Center; itself a showcase for scientific discoveries.

The Scheme of Things examines hundreds of subjects and takes us on a remarkable journey -- a journey that uses curiosity for fuel, our minds and all of our senses for a vehicle, and the world around us for a map.

This series comprised 65 episodes; James MacArthur hosted 16 (Mark Shaw hosted the remainder), which are listed below in the order in which they were filmed:

Ep. #1. Earthshake
Ep. #2. Ultralights
Ep. #3. Wildlife S.O.S.

Witness the dramatic efforts of dedicated groups battling to save some gravely endangered species. First, join a marine mammal rescue mission on the jagged shores of the Pacific Coast, and see how miracles of modern medicine are used to help wounded or stranded seals, porpoises, whales, and other marine denizens. Then travel to a special rehabilitation center where injured birds of prey --hawks, falcons, owls, and eagles -- are mended and taught to fly again.

Ep. #4. Fire in the Sky
Ep. #5. Add 20,000 Carrots and Stir
Ep. #6. Inventing the Future
Ep. #7. Magazine #107
Ep. #8. Farms Beneath the Sea
Ep. #9. The Robots Are Coming
Ep. #10. Magazine #110
Ep. #11. Undersea Colossus
Ep. #12. River of Grass
Ep. #13. A World Trapped in Stone
Ep. #17. Magazine #117
Ep. #18. Magazine #118
Ep. #22. Magazine #122