Warning, this review is a recap, with commentary; therefore, it is ONE GIANT SPOILER if you haven't seen the episode. The Expanse is BACK! Seems like forever, doesn’t it? But, we take up right where we left off. There is a news report about the disintegration of the Arboghast over Venus, and the march to war. Things are escalating. There are actual battles being fought.
This will serve as a refresher, as we are just literally starting Season 3, based on the book Abaddon's Gate, written by James SA Corey (a nom de plume for Ty Franck and Daniel Abraham). Season 2's finale episode name, Caliban's War, follows the tradition of the final episode taking the name of the book the season primarily followed.