Air date: 2023-03-06

Runtime: 45 min

Disturbing events in the world's oceans alarm scientists around the globe, launching an investigation into a mysterious threat to humanity's fragile existence.

Air date: 2023-03-06

Runtime: 45 min

As bizarre occurrences continue to unfold around the world, scientists scramble to find the source of mysterious deaths and phenomena endangering humanity.

Air date: 2023-03-07

Runtime: 46 min

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.

Air date: 2023-03-07

Runtime: 43 min

Political leaders grow skeptical about the dramatic situation on the French Atlantic coast, while the ice worms on the sea bed continue to spread.

Air date: 2023-03-08

Runtime: 45 min

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.

Air date: 2023-03-08

Runtime: 46 min

Johanson suspects that an unknown marine intelligence, which he calls Yrr, is behind the strange happenings, and wants to contact the life form.

Air date: 2023-03-09

Runtime: 46 min

The expedition to study the Yrr sets out for the Arctic, where a large number of Yrr signals were spotted.

Air date: 2023-03-09

Runtime: 45 min

With humanity's future at stake, the team butts heads on what to do. In a desperate situation, a radical decision is made.