The Expanse premieres its fourth season (thank you, Amazon) on December 13, which means you technically still have time to re-watch seasons one through three. But if you don’t have several dozen spare hours between now and next Friday, we’ve got a handy primer to remind you of exactly where things stand.
Source: io9 – The Expanse Season 4 Is Almost Here, So Here’s a Crash Course on Where the Sci-Fi Standout Left Off