The Expanse Season 4, Episode 4 ("Retrograde") escalates tensions on Ilus as Murtry's security crackdown forces a confrontation with Holden, while Bobbie Draper sinks deeper into the Martian criminal underworld amid the planet's economic collapse. The episode highlights themes of law versus order and the systemic decay of Mars and Earth in the post-Ring Gate era. For a detailed breakdown, see the full episode recap. 'Pluribus' Episode 4 recap: Policy of truth
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