The Expanse backdrop
Drama•Mystery•Sci-Fi & Fantasy

The Best Episodes of The Expanse Season 4

Every episode of The Expanse Season 4 ranked from best to worst. Discover the Best Episodes of The Expanse Season 4!

Binge this in 8h 5m•Peaking at 9.0/10

A thriller set two hundred years in the future following the case of a missing young woman who brings a hardened detective and a rogue ship's captain together in a race across the solar system

Airs on
SyfyPrime Video
BestEpisodes
WorstEpisodes
BestSeasons
AllEpisodes

Seasons6

All123456

Episode Rankings

  1. #1 Fan Favorite
    The Expanse Season 4 Episode 9 - Saeculum
    9.0/10(3512 votes)

    S4:E9

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

    Director:Breck Eisner
    Writers:Daniel Abraham, Ty Franck

    Be the first to start the conversation for this episode

  2. The Expanse Season 4 Episode 10 - Cibola Burn
    8.8/10(3646 votes)

    S4:E10

    Ashford closes in on an enemy while uncovering a dangerous plot. Avasarala faces a crossroads in her personal and political life. The Roci crew works to reestablish life on Ilus in the wake of a deadly catastrophe.

    Director:Breck Eisner
    Writers:Daniel Abraham, Ty Franck

    Be the first to start the conversation for this episode

  3. The Expanse Season 4 Episode 6 - Displacement
    8.5/10(3233 votes)

    S4:E6

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

    Director:Jeff Woolnough
    Writer:Hallie Lambert

    Be the first to start the conversation for this episode

  4. The Expanse Season 4 Episode 1 - New Terra
    8.4/10(3842 votes)

    S4:E1

    The crew of the Roci investigates a strange protomolecule ruin on an alien planet. Bobbie copes with civilian life on Mars. Drummer and Ashford battle with piracy in the Belt.

    Director:Breck Eisner
    Writers:Mark Fergus, Hawk Ostby

    Be the first to start the conversation for this episode

  5. The Expanse Season 4 Episode 2 - Jetsam
    8.4/10(3471 votes)

    S4:E2

    Avasarala is blindsided while on a visit to Mars. The Roci crew continue their protomolecule investigation while tensions between the RCE and Belters reach a tipping point. Drummer and Ashford track down a terrorist.

    Director:Breck Eisner
    Writer:Laura Marks

    Be the first to start the conversation for this episode

  6. The Expanse Season 4 Episode 8 - The One-Eyed Man
    8.4/10(3189 votes)

    S4:E8

    Avasarala faces fallout for the UN's military mission. Ashford and Drummer makes big decisions about their future within the OPA. A spreading illness on Ilus takes a toll on Amos. Alex and Naomi's attempt to rescue the Barb turns desperate.

    Director:Sarah Harding
    Writer:Dan Nowak

    Be the first to start the conversation for this episode

    7. Trending NowTRENDING NOW

    The 20 BEST Episodes of The Expanse

    READ
  7. The Expanse Season 4 Episode 3 - Subduction
    8.2/10(3346 votes)

    S4:E3

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

    Director:David Petrarca
    Writer:Dan Nowak

    Be the first to start the conversation for this episode

  8. The Expanse Season 4 Episode 7 - A Shot in the Dark
    8.2/10(3141 votes)

    S4:E7

    Naomi and Alex 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.

    Director:Sarah Harding
    Writer:Dan Nowak

    Be the first to start the conversation for this episode

  9. The Expanse Season 4 Episode 4 - Retrograde
    8.1/10(3260 votes)

    S4:E4

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

    Director:David Petrarca
    Writer:Matthew Rasmussen

    Be the first to start the conversation for this episode

  10. The Expanse Season 4 Episode 5 - Oppressor
    8.1/10(3203 votes)

    S4:E5

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

    Director:Jeff Woolnough
    Writers:Daniel Abraham, Ty Franck

    Be the first to start the conversation for this episode

Season 4 Ratings Summary

"Saeculum" is the best rated episode of "The Expanse" season 4. It scored 9/10 based on 3512 votes. Directed by Breck Eisner and written by Daniel Abraham, Ty Franck, it aired on 12/13/2019. This episode is rated 0.2 points higher than the second-best, "Cibola Burn".