Nature: Season 18
This season started on October 24, 1999. The table lists episodes with recorded air dates up to September 28, 2026.
| Ep | Title and air date | My place |
|---|---|---|
| 1 | Antarctica: The End of the Earth: Katabatic · 53 min | |
| 2 | Antarctica: The End of the Earth: Iceberg · 53 min | |
| 3 | Horses · 53 min | |
| 4 | Sled Dogs: An Alaskan Epic · 53 min | |
| 5 | Wisdom of the Wild · 53 min | |
| 6 | Inside the Animal Mind Part One: Are Animals Intelligent? · 53 min | |
| 7 | Humpback Whales · 55 min | |
| 8 | Inside the Animal Mind Part Two: Do Animals Have Emotions? · 53 min | |
| 9 | Inside the Animal Mind Part Three: Animal Consciousness · 53 min | |
| 10 | Cheetahs in a Hot Spot · 53 min | |
| 11 | Showdown at Grizzly River · 53 min | |
| 12 | Jackals of the African Crater · 55 min | |
| 13 | Obsession with Orchids · 53 min | |
| 14 | Earth Navigators · 53 min | |
| 15 | The Body Changers · 53 min | |
| 16 | Springs Eternal: Florida's Fountain of Youth · 53 min | |
| 17 | The Nature of Sex · 53 min | |
| 18 | Animal Attractions: Amazing Tales from the San Diego Zoo · 53 min |
