The crew discover they're not alone in space and learn more about where they came from.

A new polarizing figure enters the equation as the crew suffers technical difficulties.

After an unpopular decision, discord gives way to deadly mutiny in which loyalties are tested.

The situation onboard Ark One seems hopeless after crew members are taken hostage.

The crew must understand their enemy better as they attempt a dangerous rescue mission.

Ark One tries to broker peace with its adversary but doesn't realize it could cost everything.