Silas refused to help Eve, saying Isaiah was all he had. Eve caused a distraction to free herself, Levi, and Josh. Ty and Paara returned with help.

Gavin and Dr. Nathan told Agent Markham about the map and the Seattle sinkhole.

While Lilly and Veronica were trying to get to the light, Veronica got stuck in a trap. Lilly wanted to rescue her, but Veronica told her to go on ahead, saying how much she loved her.

Marybeth, Lucas, and Riley tried to get Isaiah to safety when one of Silas's men attacked. Riley got Isaiah out of there. But the men were attacking Marybeth and Lucas. A gunshot went off and hit Marybeth.

She was bleeding badly and had to go slower, so she didn't hold the group back.

Eve and company arrive at the caves. Josh and Isaiah climbed the ladder to the top. The ladder broke while Eve was climbing, and Josh pulled his mom to safety.

The LA team had difficulty tracking the sinkhole but found it 12 miles away in a campground. Gavin. Ella and Izzy decide to go thru it.

Marybeth's condition worsened. She and Lucas shared an emotional goodbye before she died.

Josh and Izzy were getting worse. Silas tried to grab Isaish, but Isaiah wanted to help Josh. He and Eve climbed the mountain, and he went through the fading light.

Josh and Eve reunite happily. Lilly was devastated she didn't get the map to Isaiah in time. She accidentally pulled Riley and Josh in with her to the fading light to 1988.

Gavin, Izzy, and Ella landed in 10,000 BC and saw a rhino.