Desperate to reunite with her son, Eve follows a lead that brings her face-to-face with a ruthless prehistoric group on the season premiere.
While Gavin enlists the help of his grandfather to guide him to his missing wife, Eve and Levi navigate a horrifying new reality.
With Gavin on the verge of dying, Eve and her family make a desperate attempt to set things right.
On the season finale, there’s news of one last sinkhole opening and a race to Seattle to launch a final rescue effort before it's too late.
With time running out before their window home closes, the survivors hatch a final escape attempt, forcing Eve to make an impossible choice.