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- 1AudubonOctober 5, 1970
- 2The Last Stand Western Mountain Parks (1)November 2, 1970
- 3The Last Stand The Everglades of Florida (2)November 9, 1970
- 4The Last Stand Point Pelee (3)November 16, 1970
- 5The Last Stand The Southwestern Desert (4)November 23, 1970
- 9The Great Lakes (1)February 1, 1971
- 10The Great Lakes (2)February 8, 1971
- 11Population Problems Everybody's Baby (1)February 15, 1971
- 12Population Problems Tomorrow's Child (2)March 1, 1971
- 13Who Help ThemselvesMarch 15, 1971
- 14Psychiatry Heavy NightMarch 22, 1971
- 15Psychiatry Street Fighting MadMarch 29, 1971
- 16Psychiatry Human PotentialApril 5, 1971
- 17Wild Africa As It Was (1)June 28, 1971
- 18Wild Africa Something New (2)July 5, 1971