When does Foundation return?

The series is loosely based on the Foundation series of stories by Isaac Asimov. It features an ensemble cast led by Jared Harris, Lee Pace, Lou Llobell and Leah Harvey. In the far future, most of the known galaxy is despotically ruled by a revolving triumvirate of Emperor Cleon clones. The series chronicles Empire's subsequent conflicts with the Foundation, and the characters which bridge the divide between them.
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.