Netflix is staging a Game of Thrones reunion. Alfie Allen has joined the cast of 3 Body Problem, reuniting TV’s erstwhile Theon Greyjoy with Thrones creators David Benioff and D.B. Weiss. Character details are being kept under wraps.

Netflix's '3 Body Problem' is expanding its cast for season two, bringing in another 'Game of Thrones' veteran, Alfie Allen, into the fold.

3 Body Problem is a sci-fi series based on a book of the same name by Liu Cixin. The show follows the decision of one woman that impacts the world for decades to come. 3 Body Problem is co-created by the creators of Game of Thrones, David Benioff and D. B. Weiss, along with Alexander Woo.