Holden and the crew face off with a Protomolecule stowaway while Bobbie tries to save Avasarala and Coyter.
Errinwright makes some power moves while the situation at Ganymede becomes more dire.
Holden and company get closer and closer to the Protomolecule and Bobbie goes rogue back on Earth.
Errinwright comes clean with Avasarala while Holden and company continue searching for Prax's daughter on Ganymede.
The effects of Ganymede reverberate through the system while Fred Johnson and the crew are on the outs with the OPA at large.
The human elements and scientific accuracy make The Expanse unique among it's peers in the genre and the showrunners know it.