Everett and the crew continue their efforts to save Destiny while holding off the Lucian Alliance invaders.

Desperate for food and water, Rush directs the ship to a planet that has been locked out of Destiny's controls. Young and Wray clash over what to do with the Alliance prisoners.

The crew encounters a ship remarkably similar to Destiny, which may hold the key to their returning home.

Young is plagued by mysterious dreams where Destiny is destroyed by alien attackers no matter what he does.

Rush and Young investigate an abandoned alien craft which is just outside the Destiny. While they do this, the crew onboard the ship find the bridge and discover that Rush is responsible for the countdown clock not activating when the ship emerges from FTL.

Simeon makes his escape from Destiny, sending Nicholas Rush on a vengeful mission. But Young and Greer attempt to retrieve Simeon unharmed.

Chloe's body is taken over by another consciousness. Meanwhile, Dr. Volker is stricken with a mysterious illness.

Rush slips into a coma in the neural interface chair, and Amanda connects with him in the ship’s matrix, but Ginn informs Eli of a problem with that scenario. Elsewhere, Dr. Rodney McKay’s plan to dial the ninth chevron address hits a snag.