The colony faces new challenges, while Ark One's latest rescue mission proves its toughest yet.

Strickland leads a search party as Garnet meets a new foe; a power struggle erupts on Ark 1.

Garnet and Ian hatch an escape plan while a mysterious explosion rocks Homebase.

On Homebase, a new arrival raises more questions; the team attempts a rescue.

A mysterious signal leads back to Ross; an investigation on Homebase takes an unexpected turn.

On Ark One, time takes on a whole new meaning - while sinister forces are revealed on Homebase.

Ark One uncovers a ship in distress as Homebase learns shocking truths about the planet's past.

Brice nears the breaking point while the crew investigates a secret organization.

Scientific research leads to a billionaire's space station as Homebase pieces the puzzle together.

An act of kindness leads to obsession; Eva and Brice fall victim to a strange phenomenon.

Ark One returns to Ark 22 with a plan; Homebase's mystery is solved - but it might be too late.

As Garnet embarks on a rescue mission, the entire crew must face an existential threat to Homebase.