With Gavin on the verge of dying, Eve and her family make a desperate attempt to set things right - even as an unexpected twist threatens to tear them apart forever.

Gavin leads his family toward a new way home, but each step inches them closer toward his devastating vision of Eve's death. Levi, ostracized from the others, is given a chance at redemption.

Eve and Gavin ally with James to infiltrate the Lazarus Building in hopes of saving Ty and stopping Kiera from destroying their only way home. A deadly horde awakens beneath the Clearing.

When the Clearing and Fort unite to celebrate the union of Ty and Paara, the invitation of a controversial guest threatens to upend the festivities. Lucas offers Veronica an unexpected strategy.

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.

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.