Guest Stars Sasha Behar as Mari Hardin Elliot Cowan as Lewis Pirenne Alfred Enoch as Raych Foss Co Starring Clarke Peters as Abbas Hardin Vanessa Ifediora as Imperial Herald Reece Shearsmith as Jerril Cooper Carter as Young Dawn Johanna O'Brien as Shivaughn Kim Adis as Lowre Carolina Main as Ambassador Shae Un Shae Brian Bovell as Trantorian Seer Priest Antony Bunsee as Ambassador Xandem Abdul Alshareef as Comms Tech Florence Ordesh as Briwan Georg Nikoloff as Senior Laundry Worker Ahd Tamimi as Magnus Seham Aar as Veena Ahluwalia Laila Pyne as Jiam Quarver