The Expanse is an American science fiction television series. It is based on the novels of the same name by James S. A. Corey. Set in a future where humanity has colonized the Solar System, it follows a disparate band of protagonists as they unwittingly unravel and place themselves at the center of a conspiracy that threatens the system's fragile peace. The series received positive critical response, with particular praise for its visuals, character development and political narrative.