The Expanse is an American science fiction television series that premiered on December 14, 2015, on Syfy. The series was developed by Mark Fergus and Hawk Ostby, based on the series of novels by Daniel Abraham and Ty Franck, writing under the pseudonym James S. A. Corey. Set in a future where humanity has colonized the Solar System, it follows United Nations executive Chrisjen Avasarala (Shohreh Aghdashloo), police detective Josephus Miller (Thomas Jane), and ship's officer James Holden (Steven Strait) and his crew as they unravel a conspiracy that threatens peace in the system and the survival of humanity.