Episode 13 - Between Worlds

Summary: Previously...Grace loses hope as all the evidence points to her Project being the cause of the plane crash. But Commander James is suspicious of events and begins some investigations of his own. Meanwhile, Thomas' own hope is renewed when he meets Susan once more. Alex prepares for his mission to return to Maunsworth House, and realises with growing anxiety, the mounting religious fervour of the Exiles in the Fortress. They have created a vast army, and are committed to the 'protection' of the Heavenfield. But Alex is stunned by the orders he is given which will once again lead him on a path to murder...