Where To Watch The Nature of Things Season 9
- 1September 9, 1968September 19, 1968
- 2Thomas EdisonSeptember 26, 1968
- 3Human EngineeringOctober 3, 1968
- 4MaterialsOctober 10, 1968
- 5StructureNovember 7, 1968
- 6CommunicationsNovember 14, 1968
- 7Canals and TunnelsNovember 21, 1968
- 8Central PowerNovember 28, 1968
- 9Man and MachinesDecember 5, 1968
- 10Land and WaterDecember 12, 1968
- 11Man AloftDecember 19, 1968
- 12Portable PowerDecember 26, 1968
- 13TransportationJanuary 2, 1969
- 14Systems EngineeringJanuary 9, 1969