Paul digs and finds the ugly truth behind the Castor Boys’ logbooks of names, pushing him into action. Meanwhile, Felix is desperate for info on Sarah’s whereabouts, and presses the…

Helena and Sarah are reunited at the Castor camp. As Sarah suffers testing, Paul appears to chide her; but his allegiances are beginning to strain. While the Leda family worries…

Mark is taken down in a Prolethean shoot-out and Sarah must step in to help. But as Sarah gathers intel that puts her on the trail of the original Castor…

Castor pursues the Leda clones for original tissue samples. Helena, who is pregnant and imprisoned, is examined by a mysterious new villain. The Castor boys are also out to play,…

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

Earth and Mars search for answers in the aftermath of the asteroid collision.

The Rocinante chases an asteroid as it hurtles towards Earth.

Holden and Miller butt heads about how the raid was handled.

With the help of Fred Johnson and the OPA, Miller, Holden and the crew stage a raid for information on the protomolecule. On Earth, Avasarala learns a truth about Fred…