Sesong 1
Bilder
| # | Bilde | Tittel | Sendt |
|---|---|---|---|
| 1 |  | The Making of a Natural History Film | 3. mars 1974 |
| 2 | Where Did the Colorado Go? | 10. mars 1974 | |
| 3 | Whales, Dolphins, And Men | 17. mars 1974 | |
| 4 | The Search For Life | 24. mars 1974 | |
| 5 | Last of the Cuiva | 31. mars 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. mai 1974 | |
| 11 | The Case of the Midwife Toad | 12. mai 1974 | |
| 12 | Fusion: The Energy Promise | 19. mai 1974 | |
| 13 | The Mystery of the Anasazi | 26. mai 1974 |