When does Foundation return?

The series is loosely based on the Foundation series of stories by Isaac Asimov. It stars Jared Harris, Lee Pace, Lou Llobell and Leah Harvey. The first season received some positive reviews, with praise aimed at performances (Pace and Harris in particular), epic scale, visual effects and score by Bear McCreary. The second season received more positive reviews from critics, with many agreeing that it was an improvement over its first season.
Foundation chronicles the thousand-year saga of The Foundation, a band of exiles who discover that the only way to save the Galactic Empire from destruction is to defy it.