Seasons
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Networks:
Watch Providers:
JustWatch makes it easy to find out where you can legally watch your favorite movies & TV shows online. Visit JustWatch for more information.
NOVA travels to Lake Baikal, the world's oldest and deepest lake, containing one-fifth of all the fresh water on Earth. Investigating Baikal from above, below and all around, NOVA charts its dramatically changing environment over the course of four seasons.