Lower-level cabinet member Tom Kirkman becomes President of the United States after a catastrophic attack on the U.S. Capitol. Kirkman must keep the country and his family safe while leading…

Bobbie makes a decision that changes her life forever.

Holden leads his crew through the war-torn station on Ganymede.

Bobbie becomes a political pawn in the struggle between Earth and Mars.

Preparations for the Earth/Mars peace conference tighten the tension on Erringwright.