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