<P> The series premiered on demand on November 23 , 2015 , and on Syfy on December 14 , 2015 . In March 2017 , Syfy renewed The Expanse for a 13 - episode third season , which premiered April 11 , 2018 . The series received positive reviews from critics , who highlighted its beautiful visuals , well - developed characters , and thrilling political narrative . It has received a Hugo Award for Best Dramatic Presentation as well as a Saturn Award nomination . </P>
when does the new season of the expanse start
April 11 , 2018