Still stranded on the island — and still reeling from the apparent loss of Ben — the campers make a last-ditch attempt at rescue by sending out an SOS.

Darius and Sammy face a moral dilemma while searching the park for supplies. The campers start building a new treehouse. Brooklynn sees something odd.

A bonfire in the distance signals that the campers have company: a pair of posh eco-tourists and their disgruntled security guy. But can they be trusted?

The campers reunite with a long-lost friend, who shares an inspiring story — then reveals that Mitch, Tiff and Hap aren't who they seem.

Darius must make a difficult choice to save Sammy and Yasmina. Meanwhile, the remaining campers are trying to decide if Hap is a friend... or a foe.

Brooklynn, Ben, Kenji and Yasmina work to uncover a secret and restore power to the park as Darius leads Mitch and Tiff straight into a T. rex trap.

A guilty Darius is determined to protect the island's innocent dinos — even if he has to do it all alone. But with luck, maybe he won't have to...