It's the best sci-fi TV series of the 21st century, but it took a risk that most shows of its ilk would avoid at all costs.

The Expanse's final season left fans hanging on all of its plotlines, but one mystery has been solved, with the fate of one character fully explained.

Amazon has picked up “The Expanse” for a fifth season. The announcement was made during the Television Critics Association summer press tour on Saturday. Season 4 of the series is set to debut on Dec.