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Episode Guide
- 1. Invaders; The One Degree Factor Apr 20, 2005
- The invasion of alien species of plants and animals and what can be done to stop it.
- 2. The One Degree Factor Apr 20, 2005
- Mysterious cases include high dust clouds over the Atlantic.
- 3. Predators; Troubled Waters Apr 27, 2005
- The disappearance of predators affects an ecosystem.