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1. Bölüm Disturbing events in the world's oceans alarm scientists around the globe, launching an investigation into a mysterious threat to humanity's fragile existence.
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2. Bölüm As bizarre occurrences continue to unfold around the world, scientists scramble to find the source of mysterious deaths and phenomena endangering humanity.
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3. Bölüm While Venice suffers an unprecedented plague of jellyfish, it's discovered that a mutated bacterium is the cause of a growing number of deaths on the coasts.
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4. Bölüm Political leaders grow skeptical about the dramatic situation on the French Atlantic coast, while the ice worms on the sea bed continue to spread.
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5. Bölüm Dr. Cécile Roche detects in crabs that have overrun coasts around the world the same bacterium that entered drinking water on the French coast via infected lobsters.
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6. Bölüm Johanson suspects that an unknown marine intelligence, which he calls Yrr, is behind the strange happenings, and wants to contact the life form.
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7. Bölüm The expedition to study the Yrr sets out for the Arctic, where a large number of Yrr signals were spotted.
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8. Bölüm With humanity's future at stake, the team butts heads on what to do. In a desperate situation, a radical decision is made.