Gavin almost convinced the guard to let them in, but the woman inside recognized Silas and Gavin. A fight ensues.

During the fight with the guards, Lucas gets zapped, and he and Scott get away and notice he has the same burn marks that killed Eddie. He convinces him to go back to the clearing.

Izzy warns Levi to stay away from her family while Eve and Sam discuss relationships.

Silas agrees to help Eve and the others and cautions them to be careful with the leader.

The Lazarus leader dropped a bombshell. He's Gavin's father.

James tells Gavin they're from 2076 and needed natural resources from 10,000 BC to fix their mistakes. He's excited to share everything with his son.

Gavin doesn't trust him since his stories don't match Silas or Aldridge. He says black rock powers up a portal to 2076. He wants to help Gavin find Josh.

Veronica is hurt. Lucas never said goodbye before the rescue mission. When Scott returns with the tourniquet, he cautions Lucas to be kinder to her.

Josh and Riley ice skate. Caroline signals for them to turn off the power again. When they return, her home is trashed, and she's gone. They find a device in the cereal box and warn 1988 teenage Sam.

Silas leads the team to the building. A crow almost attacks them.

James wants a second chance with Gavin.

Gavin reunites with his family. Sam tells everyone he has a new memory, and the portal goes to 1988.

Veronica and Lucas decide to date. Lucas gets worse.

James helps Sam and the Harrisses through the portal.

The families reunite. The ground shakes, and Riley informs them a new sinkhole is coming, and they can stop it.