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Season 4 – The Expanse

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2:27

Dec 2019

Drama

Sci-Fi

Fantasy

Adventure

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Tomatometer

Popcornmeter

100%

Tomatometer

35 Reviews

88%

Popcornmeter

1,000+ Ratings

Hundreds of years in the future, things are different than what humanity is used to after humans have colonized the solar system and Mars has become an independent military power. Rising tensions between Earth and Mars have put them on the brink of war. Against this backdrop, a hardened detective and a rogue ship's captain come together to investigate the case of a missing young woman. The investigation leads them on a race across the solar system that could expose the greatest conspiracy in human history.

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Critics Consensus

Smart and thrilling as ever, The Expanse's fourth season doesn't miss a beat, successfully navigating network changes without losing any of its rich character work or narrative complexities.

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Steve Greene

IndieWire

Dec 16, 2019

A-

"The Expanse" takes it as an opportunity to reinvent itself as needed and preserve what's worked all along. It's a show that spends plenty of time dissecting the complications with changes in the very nature of gravity.

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Melanie McFarland

Salon.com

Dec 13, 2019

This series is stunning in all the right ways.

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Zack Handlen

AV Club

Dec 11, 2019

A-

Naomi's struggles, and the attention paid to those struggles, is emblematic of what makes The Expanse so effective.

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Mark Serrels

CNET

Mar 28, 2023

The magic of The Expanse is how effortlessly the show flits between genres...

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Nathan Mattise

Ars Technica

Jul 28, 2021

It may not have become the cultural mainstay Trek has, but it's beloved enough by a small-yet-diehard fanbase that Amazon renewed it for a fifth season before airing a single episode.

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David Hogan

hoganreviews.co.uk

Jun 1, 2020

5/5

Another Season of the Expanse, another review of pretty much nothing but praise. Who knew well-regarded sci-fi books + great cast + high budget = great television?

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G G

@MChief117 Jan 11, 2026

Just like the other season, I can easily say that this is the best sci-fi tv show ever 💯💯

Monty T

@RT13239560 Mar 24, 2025

When are new seasons from the rest of the books coming??

Gaming N

@RT91327692 Sep 29, 2024

pretty decent, still my least favourite so far but good

The C

@RT91296379 Sep 16, 2024

Still good. But not as good as the previous seasons.

Honest D

@RT10468612 Aug 2, 2024

I really liked this show up to the 4th season. It's by far the worst one. The rest have all been really great until the 4th and I hope that what I read was true, the next seasons get better after S4.

Petr L

@RT11537672 Jun 18, 2024

The best sci-fi ever made. I watch regularly every year.

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Steven Strait

Holden

Shohreh Aghdashloo

Chrisjen Avasarala

Dominique Tipper

Naomi Nagata

Cas Anvar

Alex Kamal

Wes Chatham

Amos Burton

Frankie Adams

Bobbie Draper

Episode 1

Aired Dec 13, 2019

New Terra

With 1300 new worlds within reach, a new interplanetary "land rush" has started; the UN charges the Rocinante crew to settle a land dispute on its new colony world, New Terra; the OPA starts transitioning the Behemoth to become a gatekeeper.

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Episode 2

Aired Dec 13, 2019

Jetsam

Avasarala is blindsided while visiting Mars; the Roci crew continues its protomolecule investigation as tensions between the RCE and Belters reach a tipping point.

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Episode 3

Aired Dec 13, 2019

Subduction

New alien threats emerge on Ilus as Naomi battles health challenges on the planet; Bobbie looks for a missing person on Mars; Avasarala faces a new challenge in the UN.

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Episode 4

Aired Dec 13, 2019

Retrograde

Drummer and Ashford confront a dangerous person from Naomi's past; Murtry hunts down a target; Bobbie makes a life-changing confession.

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Episode 5

Aired Dec 13, 2019

Oppressor

As tensions reach a boiling point on Ilus, Holden reveals a secret; Avasarala debates Nancy Gao as an emergency on the Roci forces Alex and Naomi into action.

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Episode 6

Aired Dec 13, 2019

Displacement

The Roci crew prepares for an incoming disaster on Ilus; Drummer and Ashford close in on an enemy within the Belt; Bobbie takes on a dangerous job.

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Episode 7

Aired Dec 13, 2019

A Shot in the Dark

Alex and Naomi work to keep the Barbapiccola in orbit amidst a power outage; Avasarala faces a tough decision; Holden and Elvi race to find a cure for a disease spreading on Ilus.

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Episode 8

Aired Dec 13, 2019

The One-Eyed Man

Avasarala faces fallout for the UN's military mission; Drummer and Ashford make big decisions about their futures within the OPA; a spreading illness on Ilus takes a toll on Amos.

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Episode 9

Aired Dec 13, 2019

Saeculum

Miller and Holden race to save Ilus; Murtry puts his endgame into motion, putting the Roci crew's lives at risk.

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Episode 10

Aired Dec 13, 2019

Cibola Burn

Ashford closes in on an enemy while uncovering a dangerous plot; Avasarala faces a crossroads in her political and personal lives; the Roci crew works to reestablish life on Ilus.

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