The Nature of Things: Season 9
This season started on September 26, 1968. The table lists episodes with recorded air dates up to September 28, 2026.
| Ep | Title and air date | My place |
|---|
| 1 | Thomas Edison | |
| 2 | Human Engineering | |
| 3 | Materials | |
| 4 | Structure | |
| 5 | Communications | |
| 6 | Canals And Tunnels | |
| 7 | Central Power | |
| 8 | Man And Machines | |
| 9 | Land And Water | |
| 10 | Man Aloft | |
| 11 | Portable Power | |
| 12 | Machines And Man: Transportation | |
| 13 | Machine And Man: Systems Engineering | |
| 14 | Audubon | |
