Zak Penn Creator, Executive Producer, Writer Lena Headey Aster Actor, Executive Producer Stephan James Halan Actor, Executive Producer Carolina Bartczak Dr. Ree Avalon Guest Star Marc Menchaca Keir Guest Star Eric Lange Milan Aleph Guest Star Wade Bogert-O'Brien Bart Guest Star A.J. Simmons Farut Guest Star Sydney Ozerov-Meyer Grisha Guest Star Glen Mazzara Executive Producer David Fortier Executive Producer Ivan Schneeberg Executive Producer James Middleton Executive Producer Nick Nantell Executive Producer Tina Thor Executive Producer Katie O'Connell Marsh Executive Producer Elisa Ellis Executive Producer Liz Varner Executive Producer Ira Steven Behr Executive Producer Daniel Percival Executive Producer Joy Blake Executive Producer Oz Scott Director Allison Moore Writer