Seizoen 1
Afbeeldingen
| # | Afbeelding | Titel | Uitgezonden |
|---|---|---|---|
| 1 |  | The Making of a Natural History Film | 3 mrt 1974 |
| 2 | Where Did the Colorado Go? | 10 mrt 1974 | |
| 3 | Whales, Dolphins, And Men | 17 mrt 1974 | |
| 4 | The Search For Life | 24 mrt 1974 | |
| 5 | Last of the Cuiva | 31 mrt 1974 | |
| 6 | Strange Sleep | 7 apr 1974 | |
| 7 | The Crab Nebula | 14 apr 1974 | |
| 8 | Bird Brain: The Mystery of Bird Navigation | 21 apr 1974 | |
| 9 | Are You Doing This For Me, Doctor? | 28 apr 1974 | |
| 10 | The First Signs of Washoe | 5 mei 1974 | |
| 11 | The Case of the Midwife Toad | 12 mei 1974 | |
| 12 | Fusion: The Energy Promise | 19 mei 1974 | |
| 13 | The Mystery of the Anasazi | 26 mei 1974 |