Missing people at Wellington Zoo could be the work of a new creature that came from the future. Helen reappears offering to help but Lester and Claudia are suspicious of her true intentions.
Matt and Abby go through the New Dawn anomaly to rescue Connor from a future wasteland. Meanwhile in the present the anomaly is radically altering the Earth's atmosphere, spelling the end of all life on Earth.
Danny, Connor and Abby pursue Helen Cutter through a series of anomalies in order to stop her from wiping out humanity's ancestors, facing dangerous obstacles along the way.
With the ARC team held captive Stephen reluctantly helps Lester capture a Silurian Scorpion let loose on a popular beach. The conspiracy unravels and people working closely on the project die -- or do they?
As the rest of the team capture a Columbian Mammoth running rampant on the M25, Stephen allies himself with Helen. The traitor is finally revealed as they attempt to kill Lester and destroy the ARC from within.
Still stuck in the Cretaceous period, Connor and Abby continue their mission to survive and find a way back to the present where the ARC has been rebuilt and updated with two new members.
The team are called to an old prison where a tourist has mysteriously vanished. While there, former team leader Danny Quinn unexpectedly reemerges through an anomaly and Ethan's true identity is revealed.
As the team make plans to stop Philip from creating his anomaly they're alerted to a T-Rex wreaking havoc in the city. Soon anomalies are opening all over the world, it's the ARC's biggest challenge yet.
Cutter grapples with Claudia's disappearance after he returns to a very different present than the one he left. Soon after, the team are called in to capture a pack of raptors on the loose at a local shopping center.
The team discover a creature that can camouflage itself at an abandoned house. As they investigate, they cross paths with an interfering cop. Meanwhile, their headquarters is infiltrated by someone who should have been dead.