Avasarala, with the Combined Fleet of Earth and Mars, takes the war to Marco. Filip and Marco’s relationship is tested. The war becomes more perilous and personal for Holden and…

The final battle between Earth and Mars threatens the very future of humanity. A new monster is unleashed on Prospero Station. Anna receives the smoking gun she needs.

The search for Prax’s daughter comes to a head. Admiral Souther’s men plan for mutiny aboard the Agatha King

The Rocinante tends to wounded Martian soldiers in exchange for supplies. Avasarala struggles with how to disseminate a key piece of evidence despite being in hiding.

As Earth strategizes a costly ploy to gain advantage in the war against Mars, Anna struggles to convince Sorrento-Gillis to do the right thing. Avasarala and Bobbie seek refuge aboard…

The Rocinante answers an unexpected distress signal. Bobbie and Avasarala find themselves being hunted by a mysterious captor. UN Secretary-General Sorrento-Gillis brings in a colleague from his past to lend…

The Rocinante crew deals with the fallout over Naomi’s betrayal while caught in the middle of the war between Earth and Mars while Avasarala and Bobbie hatch an escape plan.

The Rocinante crew must fight to save the ship.

A discovery pushes Naomi and Holden apart and sets the Rocinante crew against each other.

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.

Naomi tracks down signs of the protomolecule; Fred Johnson’s control over the OPA collapses.

The next person on Arrow’s list is Diggle’s commanding officer and mentor from Afghanistan, Ted Gaynor. Oliver suspects Ted is responsible for recent armoured truck robberies, but Diggle defends Ted…

Shumway secretly orders one of the 100 to kill Bellamy. Meanwhile, hallucinogenic nuts provide Octavia with an opportunity to help the Grounder escape the camp, and Bellamy and Clarke investigate…

While Bellamy tortures the Grounder, Raven and Clarke make contact with the Ark and ask Abby to help them save Finn. On the Ark, Kane deals with his guilt, and…

Bellamy, Finn and Jasper head into Grounder territory to search for Octavia, as flashbacks show the siblings’ difficult childhood on the Ark. Meanwhile, Raven finds out about Clarke and Finn.

A plan to contact the Ark is put in motion after Raven crash lands on Earth. Meanwhile, Abby exposes Kane’s plan to reduce the population of the Ark.

97 years after a nuclear war, human kind is living in space. 100 juvenile delinquents are sent down to Earth to see if the planet is habitable.