Season 9 aired between 26 Sep 1968 and 18 Mar 1969, 14 episodes.
Episodes
E01
Thomas Edison
26 Sep 1968
E02
Human Engineering
03 Oct 1968
E03
Materials
10 Oct 1968
E04
Structure
07 Nov 1968
E05
Communications
14 Nov 1968
E06
Canals and Tunnels
21 Nov 1968
E07
Central Power
28 Nov 1968
E08
Man and Machines
05 Dec 1968
E09
Land and Water
12 Dec 1968
E10
Man Aloft
19 Dec 1968
E11
Portable Power
26 Dec 1968
E12
Machines and Man: Transportation
02 Jan 1969
E13
Machine and Man: Systems Engineering
09 Jan 1969
E14
The Rocky Mountains
18 Mar 1969