Jared Harris Dr. Hari Seldon Actor Lee Pace Brother Day Actor Lou Llobell Gaal Actor Leah Harvey Salvor Actor Laura Birn Demerzel Actor Cassian Bilton Brother Dawn Actor Terrence Mann Brother Dusk Actor Isabella Laughland Brother Constan Actor Kulvinder Ghir Poly Verisof Actor Ella-Rae Smith Queen Sareth of Cloud Dominion Actor Holt McCallany Warden Jaegger Fount Actor Rachel House Tellem Bond Actor Nimrat Kaur Yanna Seldon Actor Ben Daniels Bel Riose Actor Dimitri Leonidas Hober Mallow Actor Robyn Asimov Executive Producer David S. Goyer Executive Producer, Writer Josh Friedman Executive Producer Cameron Welsh Executive Producer David Ellison Executive Producer Dana Goldberg Executive Producer Marcy Ross Executive Producer Victoria Morrow Executive Producer Leigh Dana Jackson Executive Producer Russell Rothberg Executive Producer Isaac Asimov Writer