With the air supply failing on the Destiny, a team disembarks to a desert-like planet in search of the mineral needed to scrub the ship’s air of carbon dioxide. After testing numerous sand samples without success, and with their window of opportunity closing fast, the group opts to split into two to cover more ground, despite the unbearable heat.

The Destiny suffers a power crisis, putting the lives of the stranded crew in jeopardy and forcing them to consider abandoning the ship.

Aboard Destiny, Dr. Rush supervises the exploration of new areas of the ship. Looking for resources to make their everyday lives easier, the crew stumbles upon a piece of Ancient technology that carries the promise of a way home. While somewhat familiar with the find, Dr. Rush can’t guarantee the safety of using it, bringing him and Col. Young to a standoff on what to do.

The Destiny has jumped into hyperspace and is now traveling through an inter-galactic void. They've also been unable to locate Eli, Chloe and Scott who have been left behind. Dr. Rush has calculated that based on their current energy consumption, the Destiny has insufficient fuel to reach the next galaxy and they are doomed to die. The engines suddenly fail however and they arrange for an expert, Amanda Perry, to come on board via the communication stones and help them out. Perry and Rush have known each other for many years but as a quadriplegic, is experiencing what life has to offer. On Earth, Camile Wray's consciousness has been transferred to Perry's body and is wheelchair bound.

Rush travels back in time to avert a disaster, meeting a past version of himself.