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