The Expanse Wiki
The Expanse Wiki

Season Four is the fourth season of Amazon's The Expanse and the first to air after the migration from Syfy to Amazon Studios. Amazon officially ordered Season 4 on May 26, 2018.[3] The season premiered on December 13, 2019[2] and consisted of ten episodes that were all released at once.[1]

The fourth season centers primarily on Cibola Burn. The season also retained viewpoints of Earth, Mars and the Belt in addition to those of the Ilus-centric viewpoints in the Cibola Burn novel.[4][5] The Additional plots elements involving those characters is primarily borrowed from Nemesis Games and Gods of Risk.[4]


With the Ring gates now open to thousands of new planets, a blood-soaked gold rush begins, igniting new conflicts between Earth, Mars, and the Belt. Meanwhile, on one unexplored planet, the Rocinante crew gets caught in a violent clash between an Earth mining corporation and desperate Belter settlers as deadly, new threats from the protomolecule emerge.



Special appearances by[]




Overall No. Image Title Writer(s) Director(s) Airdate
New Terra ep1 image.jpg "New Terra" Mark Fergus & Hawk Ostby[6] Breck Eisner 12/13/19
The crew of the Rocinante 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.
Jetsam episode image.jpg "Jetsam" Laura Marks Breck Eisner 12/13/19
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.
Subduction ep3 image.jpg "Subduction" Dan Nowak David Petrarca[7] 12/13/19
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.
Retrograde ep4 image.jpg "Retrograde" Matthew Rasmussen David Petrarca 12/13/19
Drummer and Ashford confront a dangerous person from Naomi's past. Murtry hunts down a target. Bobbie makes a life-changing confession.
D yKCTEU8AA92jU.jpg large.jpg "Oppressor" Daniel Abraham & Ty Franck Jeff Woolnough 12/13/19
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.
Displacement ep6 image.jpg "Displacement" Hallie Lambert Jeff Woolnough 12/13/19
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.
ShotDark ep7 image.jpg "A Shot in The Dark" Dan Nowak Sarah Harding 12/13/19
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.
One-Eyed ep8 image.jpg "The One-Eyed Man" Dan Nowak Sarah Harding 12/13/19
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.
Saeculum ep9 image.jpg "Saeculum" Daniel Abraham & Ty Franck Breck Eisner [8] 12/13/19
Holden and Miller race to save Ilus. Murtry puts his endgame into motion, putting the Roci crew's lives at risk.
Cibola Burn ep10 image.jpg "Cibola Burn" Daniel Abraham & Ty Franck[9] Breck Eisner [8] 12/13/19
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.


Cibola Burn

Major deaths[]

Chandra Wei
The Investigator
Klaes Ashford


Season 4 was the first season not to be broadcasted on live TV and not get weekly viewership ratings. The season ranked high as 4th in most wanted digital original in the United States in December 2019.[10]

Production schedule[]

Block Episodes Director's start Photography Director's end
1 "A" 1 - "New Terra"
2 - "Jetsam"
August 29, 2018[11] October 1 through October 25
2 "B" 3 - "Subduction"
4 - "Retrograde"
TBD October 24 through November 18
3 "A" 5 - "Oppressor"
6 - "Displacement"
TBD November 17 through December 10[12]
4 "B" 7 - "A Shot in The Dark"
8 - "The One-Eyed Man"
TBD December 9 through January 15
(holiday break December 22 through January 7)
5 "A" 9 - "Saeculum"
10 - "Cibola Burn"
December 13, 2018 January 14 through February 6 February 7, 2019



See also[]


External links[]