In the remnant of a shattered satellite, far above the ruined planet Earth, Steven Taylor and Oliver Harper are dying. As time runs out, they face their pasts… and a secret long kept is revealed.
The borrowed time is elapsing, and they realize they are facing an enemy that cannot be defeated. The cold, hard facts of science.
Written By: Simon Guerrier
Directed By: Lisa Bowerman
Peter Purves (Steven Taylor), Tom Allen (Oliver Harper)
Producer David Richardson
Script Editor Jacqueline Rayner
Executive Producers Jason Haigh-Ellery and Nicholas Briggs