Grace and Darius seek answers from the President and Harris discovers deadly secrets.

Grace and Harris must forge an alliance when their children’s lives are in jeopardy. Also, Liam presents Jillian with an unusual proposal.

Darius, Grace and Harris join forces to prove the president was murdered. Also, Grace tells Zoe the truth.

Harris, Grace and Darius must topple the illegitimate government, and Darius makes final plans for the ark.

After a nuclear incident, the secret of the asteroid becomes public, setting the world on a dangerous course. Darius, Grace, Liam and Harris must adapt to new roles in an ever-shifting landscape of fear and civil unrest.

Darius and Grace must forge an emotional détente to get international cooperation. Liam meets a new scientist who has a mysterious past.

Grace is asked to lie under oath. Darius tasks Liam with a dangerous mission. A shocking act of violence plunges the nation into chaos.

Grace forges a dangerous alliance with Claire’s brother, Alonzo. Also, Harris and Darius must work together to face down Bennett’s forces

Darius and Grace’s relationship is tested, and President Mackenzie attempts to bring the fractured country together while the hacktivist group ReSyst issues a deadly edict.