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.
After being forced to resign from the ARC by Philip, Connor visits his old friend Duncan who has become obsessed with creature sightings since Tom's death. The pair investigate a dangerous creature on the loose at the docks.
A mysterious trio of time travellers arrive in the present through an anomaly in a theatre. As Matt and the team investigate, Connor helps Philip test out his new lockdown system at the ARC.
Matt, Becker and Connor head to a school where a carnivorous Therocephalian has killed a teacher. Back at the ARC Philip suggests they put down the creatures in the menagerie, angering Abby who turns to Lester for help.
Matt, Abby and Connor travel to Witchfield Cove where a camper was killed. They suspect the village's mythical Witchfield Worm is no myth but a creature that came through an anomaly.
When a pack of hyaenodon come through an anomaly at a stately home Connor and Abby are reunited with Jenny Lewis, now an ordinary citizen about to get married. Meanwhile Becker and Jess go after Ethan.
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.
Philip recruits Connor for his New Dawn project when the team are called to deal with a giant subterranean insect dragging victims to its nest. Meanwhile Lester believes he is up for a knighthood.
A liopleurodon comes through an underwater anomaly and attacks a Royal Navy submarine. Lester contends with an admiral intent on using nuclear weapons to close the anomaly.
The team are called to an art exhibition where they find a raptor on the loose. They lure it back through the anomaly - into Victorian London. Matt goes through to fix their mistake and is reunited with Emily.
Ignoring Matt's warnings, Connor creates the first man-made anomaly for Philip's New Dawn project. Soon after, a deadly swarm of future beetles come pouring through and the team must fight to survive.
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.
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.
