The Swarm

Marine biologist Charlie Wagner, stationed at an outpost in the Shetland Islands, unravels a phenomenon that captivates Professor Lehmann's undivided attention; cetologist Leon Anawak grows concerned about the abnormal behaviour of whales.

In Canada, whales launch ferocious assaults on unsuspecting tourists; in France, once-harmless lobsters transform into fierce creatures; Swedish scientist Dr Johanson uncovers aggressive worms breeding at an alarming rate.

An unusual onslaught of jellyfish spreads in Venice; biologist Cécile Roche harbours intriguing speculations regarding the mysterious deaths; researcher Anawak diligently delves into the depths of the enigmatic whale attacks.

Cécile urges for an immediate halt to fishing activities along the coast and emphasises the potential risks associated with using tap water; researchers intensify their scrutiny of the ice worms as they conduct further investigations.

When Rahim and Charlie report a light phenomenon and a sound that Jess has recorded, Johanson travels to Shetland. They receive a warning that a tsunami is heading for the Atlantic coast of northern Europe and Shetland.

Charlie and Johanson journey back to Kiel and participate in a UN gathering in Geneva. During this meeting, Dr Roche unveils her prediction of an imminent global peril looming over the world's drinking water supply.