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The Expanse

The Expanse is an American science fiction television series based on the novel series of the same name by Daniel Abraham and Ty Franck, writing as James S.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 26, 2026|2 min read| Fact-checked

The Expanse is an American science fiction television series based on the novel series of the same name by Daniel Abraham and Ty Franck, writing as James S. A. Corey. Set in a future where humanity has colonized the Solar System, it follows political conflict among Earth, Mars, and the Belt alongside a larger mystery involving alien technology. The series originally aired on Syfy before moving to Amazon Prime Video and ran for six seasons from 2015 to 2022.

Premise

The Expanse is set in a colonized Solar System where tensions among Earth, Mars, and the Belt create a fragile political balance. The plot centers on a conspiracy involving missing persons, interplanetary conflict, and alien technology. The story follows characters including James Holden, Josephus Miller, and Chrisjen Avasarala.

Production and release

The series was developed by Mark Fergus and Hawk Ostby and adapted from the novels by James S. A. Corey. It premiered on Syfy in 2015, later moved to Amazon Prime Video, and concluded in 2022. The series consists of 62 episodes across six seasons. In Canada, the series was broadcast on Space during its early seasons.

Setting and factions

The setting presents a future in which Earth and Luna are represented by the United Nations, Mars is an independent military power, and the Outer Planets Alliance represents many Belt and outer-system communities. Its central powers include Earth, Mars, and the Outer Planets Alliance (OPA). This political structure drives much of the series’ conflict.

Reception

The Expanse became known for its detailed world-building, political intrigue, and comparatively realistic treatment of space travel. It developed a strong reputation among science fiction television audiences.

Key facts

  • The Expanse is set hundreds of years in the future, after humanity has colonized the Solar System.
  • The story follows characters including James Holden, Josephus Miller, and Chrisjen Avasarala.
  • The series premiered in 2015 on Syfy and later continued on Amazon Prime Video.
  • It ended in 2022 after six seasons.
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Canadian context

The Expanse was broadcast in Canada on Space during its early seasons, giving it a notable Canadian television presence.

Frequently asked questions

What is The Expanse about?
It follows a group of characters in a future Solar System as they uncover a conspiracy that threatens peace between Earth, Mars, and the Belt.
What is The Expanse based on?
It is based on the novel series by Daniel Abraham and Ty Franck, who wrote under the name James S. A. Corey.
When did The Expanse first air?
It first aired in 2015 on Syfy.
How many seasons does The Expanse have?
The television series has six seasons.
What platform continued the series after Syfy?
Amazon Prime Video picked up the series after its run on Syfy.

References

  1. Wikipediahttps://en.wikipedia.org/wiki/The_Expanse_(TV_series)
    Supports: Series premise, setting, main characters, and overall run
  2. Rotten Tomatoeshttps://www.rottentomatoes.com/tv/the_expanse
    Supports: Synopsis, network, genre, and release information
  3. Wikipedia (French)https://fr.wikipedia.org/wiki/The_Expanse_(s%C3%A9rie_t%C3%A9l%C3%A9vis%C3%A9e)
    Supports: Canadian broadcast on Space, episode count, and adaptation details
  4. TV Guidehttps://www.tvguide.com/tvshows/the-expanse/1000588257/
    Supports: Series dates, seasons, and synopsis
  5. IMDbhttps://www.imdb.com/title/tt3230854/
    Supports: Series dates, origin, and general description