: Gavin , Izzy , and Ella finally reach the clearing. Gavin quickly realizes Eve is missing and enlists his grandfather Silas to lead him to the Exiles' cave. The rescue is a success, but it establishes the "black rocks" as a critical power source for the mysterious Lazarus project. The 1988 Mystery: The Suspicious Man

: This timeline begins to connect back to Gavin's past, as Josh and Riley realize the importance of the time-travel technology being developed in this era. Character Dynamics and Theories

: While imprisoned, they meet Virgil , another sinkhole survivor who has been held captive, providing a broader look at how many people are actually trapped in this era.

: They realize they are being followed by a man who eventually reveals he has deep knowledge of the sinkholes and the portals.

: The duo is taken to a camp and forced to mine "black rocks" under brutal conditions.

The primary conflict focuses on and Levi , who have been captured by a ruthless group known as the Exiles .