8.4/103,514 votes#1 - New Terra
Season 4 Episode 1 - Aired 12/13/2019
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
Writer: Mark Fergus, Hawk Ostby
8.4/103,165 votes#2 - Jetsam
Season 4 Episode 2 - Aired 12/13/2019
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
8.3/103,046 votes#3 - Subduction
Season 4 Episode 3 - Aired 12/13/2019
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
8.1/102,971 votes#4 - Retrograde
Season 4 Episode 4 - Aired 12/13/2019
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
8.2/102,918 votes#5 - Oppressor
Season 4 Episode 5 - Aired 12/13/2019
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
Writer: Daniel Abraham, Ty Franck
8.5/102,942 votes#6 - Displacement
Season 4 Episode 6 - Aired 12/13/2019
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
8.3/102,862 votes#7 - A Shot in the Dark
Season 4 Episode 7 - Aired 12/13/2019
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
8.5/102,910 votes#8 - The One-Eyed Man
Season 4 Episode 8 - Aired 12/13/2019
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
9.0/103,193 votes#9 - Saeculum
Season 4 Episode 9 - Aired 12/13/2019
Holden and Miller race to save Ilus. Murtry puts his endgame into motion, putting the Roci crew's lives at risk.
Director: Breck Eisner
Writer: Daniel Abraham, Ty Franck
8.8/103,333 votes#10 - Cibola Burn
Season 4 Episode 10 - Aired 12/13/2019
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
Writer: Daniel Abraham, Ty Franck
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!
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...
Genres:DramaMysterySci-Fi & Fantasy
Season 4 Ratings Summary
"New Terra" is the best rated episode of "The Expanse" season 4. It scored 8.4/10 based on 3514 votes. Directed by Breck Eisner and written by Mark Fergus, Hawk Ostby, it aired on 12/13/2019. This episode is rated 0.0 points higher than the second-best, "Jetsam".