Gregory Hatton

Eve, Gavin and others attempt to commandeer a shipment of black rock to gain access to the mysterious building, where they hope to find a way to bring Josh and Riley home; Josh and Riley must act swiftly to stop Caroline from altering the timeline.

When a survivor is murdered, Lucas and Sam lead a contentious investigation to find the killer; Gavin embarks on a mission to save Eve from the fateful vision he's had of her death; Eve finds herself closer than ever to seeing it come true.

The Harrises return to 10,000 B.C., determined to upload a virus that will stop all sinkholes, despite knowing that this will mean they will never get home again; an unlikely leader rallies the clearing to face an oncoming prehistoric threat.

A ruthless enemy holds the clearing captive, threatening to kill a beloved survivor if their demands for an unexpected item aren't met; Gavin and Sam lead the rescue attempt, aided by an old friend whose return holds more questions than answers.

After an emotional reunion, Gavin and Eve attempt a daring escape from their unforgiving captors; Lucas leads a dangerous mission to the fort to reclaim the resources his friends so desperately need.

Gavin enlists his grandfather's help to guide him to his missing wife; Eve and Levi navigate a horrifying new reality; in 1988, Josh and Riley discover they're being followed by a man who reveals information about the mystery behind the sinkholes.