It Reaches Out

Tropes:

Cliffhanger: The Behemoth fires a missile that comes seconds away from destroying the Rocinante, only for the protomolecule to stop it dead in its tracks... and then the episode ends.
Dead Person Conversation: Holden has one of these, due to the sudden and unexplained reappearance of Miller.
Secret Diary: Amos reads Holden's autodoc logs, which Alex feels is a breach of trust (however, that doesn't stop him from asking Amos what the logs said).