Season 18
Episodes
1 Antarctica: The End of the Earth: Katabatic Oct 24, 1999 2 Antarctica: The End of the Earth: Iceberg Oct 31, 1999 
3 Horses Nov 14, 1999 
4 Sled Dogs: An Alaskan Epic Nov 21, 1999 
5 Wisdom of the Wild Dec 5, 1999 
6 Inside the Animal Mind Part One: Are Animals Intelligent? Jan 4, 2000 7 Humpback Whales Jan 9, 2000 
8 Inside the Animal Mind Part Two: Do Animals Have Emotions? Jan 11, 2000 
9 Inside the Animal Mind Part Three: Animal Consciousness Jan 18, 2000 
10 Cheetahs in a Hot Spot Feb 6, 2000 
11 Showdown at Grizzly River Feb 13, 2000 12 Jackals of the African Crater Feb 27, 2000 
13 Obsession with Orchids Apr 16, 2000 
14 Earth Navigators Apr 23, 2000 
15 The Body Changers May 7, 2000 16 Springs Eternal: Florida's Fountain of Youth May 14, 2000 
17 The Nature of Sex Jun 11, 2000 
18 Animal Attractions: Amazing Tales from the San Diego Zoo Feb 27, 2000
3 Horses Nov 14, 1999 4 Sled Dogs: An Alaskan Epic Nov 21, 1999 5 Wisdom of the Wild Dec 5, 1999 6 Inside the Animal Mind Part One: Are Animals Intelligent? Jan 4, 2000 7 Humpback Whales Jan 9, 2000 8 Inside the Animal Mind Part Two: Do Animals Have Emotions? Jan 11, 2000 9 Inside the Animal Mind Part Three: Animal Consciousness Jan 18, 2000 10 Cheetahs in a Hot Spot Feb 6, 2000 11 Showdown at Grizzly River Feb 13, 2000 12 Jackals of the African Crater Feb 27, 2000 13 Obsession with Orchids Apr 16, 2000 14 Earth Navigators Apr 23, 2000 15 The Body Changers May 7, 2000 16 Springs Eternal: Florida's Fountain of Youth May 14, 2000 17 The Nature of Sex Jun 11, 2000 18 Animal Attractions: Amazing Tales from the San Diego Zoo Feb 27, 2000