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Crowded/Uncrowded: Human Survival/Controlling Densities (1x65)
Season finale
Air date: Feb 15, 1980
REHASHED FROM PREVIOUS FOUR EPISODES: Lisa rides a hot-air balloon.
FILM INSERT: The elephant struggles for survival in Africa.
ADDITIONAL: The black hole.
- Premiered: Jan 1980
- Episodes: 225
- Followers: 0
