La Brea

The sight of a crashing plane spreads a wave of unexpected hope through the clearing as Eve and the other survivors search for its fallen pilot. Gavin and Izzy seek help from an unlikely source after the government permanently suspends their mission into the sinkhole.

Eve, Levi and the rest of the search party explore a mysterious fort that raises more questions than answers. With the help of a new ally, Gavin and Izzy embark on a dangerous and unauthorized mission to save their family despite government warnings that they could cause unprecedented disaster.

With time running out before their window home closes, the survivors of the sinkhole hatch a final escape attempt. That plan, however, is put into question when they receive a stark warning from Gavin that their plan will end in disaster and forces Eve to make an impossible choice.

When a chaotic superstorm hits the clearing, a structural collapse puts Marybeth and Lucas' lives in danger. Eve, still at odds with everyone, tries to make amends by leading the effort to dig them out. Gavin embarks on a journey into his past.

With cold weather approaching, Eve, Levi and Ty return to the fort, despite their near-death experience there, hoping to learn 10,000 B.C. survival skills. Gavin's attempts to spare Izzy pain threatens their relationship.

With news of one last sinkhole opening, Gavin, Izzy and Dr. Nathan race to Seattle to launch a final rescue effort before it's too late. Eve embarks on a perilous journey to send a young boy though a portal in order to save her family.