Primeval - Episode 3

Cutter is desperate to make Lester realize how dangerous anomalies could become to humanity, but, infuriatingly, Lester remains optimistic that this problem will disappear just as quickly as it arrived. However, the arrival of a vicious sea creature (a Mosasaur) at a local swimming pool means bad news all around, particularly for a pair of young lifeguards flouting the heavy-petting ban. The young man becomes the Mosasaur's next meal while his girlfriend is charged with his murder. When the boy's regurgitated body is found in a nearby reservoir, Cutter realizes they've got another prehistoric killer on their hands.

If that were not bad enough, the anomaly through which the Mosasaur came is a mobile one, and it has moved from the swimming pool to the depths of the reservoir. The team works hard to find and contain it, but how can you plug a leak in time?

When a military diver working alongside the team disappears into the darkness of the anomaly and another ferocious Mososaur is unleashed to attack an unsuspecting Abby, it is clear that the reservoir has become a death trap. Will Connor find the strength to protect the love of his life, and where will the anomaly move to next? Cutter thinks the anomaly is running along a kind of temporal fault line, but without proof Lester is quick to dismiss his ideas as outlandish.

Meanwhile, a young mother who lives along Cutter's predicted line is putting on her washing in the basement when she notices a small leak, which quickly turns into a flood. When she sends a plumber down to investigate, she has no idea that a Cretaceous Era predator is lurking under the water, ready to pounce.

But there are more surprises to come. The anomaly in the cellar expels the body of the lost diver, and there is a message tied to his corpse from Helen Cutter. Claudia's suspicions are suddenly confirmed: Helen is still alive. A furious confrontation with Cutter reveals his awareness of her existence. Now he must pay the price for his betrayal. Lester delivers the ultimatum - bring her back or you're out.

Cutter reluctantly agrees and, for the first time in eight years, he comes face to face with his estranged wife, who seems to be quite happy living in the past. The elusive Helen tries to entice him to stay and explore her brave new world, but what is really on her agenda? Can she be willing to let thousands die in the jaws of prehistoric killers rather than return and share her priceless knowledge? A bitter confrontation between the spouses leads to Cutter's rejection of his wife's proposition. But as he leaves to make his way back through the anomaly, a violent attack by a 20-foot Mososaur nearly maroons him permanently in the past. When he awakes in the present, he finds he didn't come back alone?