As Gavin and Sam search for a secret military base, they're surprised by an old colleague of Gavin's who may hold the clues to finding Eve.
As the Survivors attempt to integrate with the villagers at the Fort, a flock of vicious pterodactyls attacks their new home.
In the series finale, Gavin leads the survivors in trying to find Eve, Josh and Riley. Will he be able to finally reunite his family?
A traitor turning on the survivors leads to a deadly confrontation as they're shocked to learn where Eve has been taken.
When a massive fire breaks out, forcing everyone to flee, Sam and Lucas lead the group's fight for survival.