Jodie Turner-Smith as Melantha Jhirl[1] Gretchen Mol as Dr. Agatha Matheson[1] Eoin Macken as Karl D’Branin[1] David Ajala as Roy Eris[1] Angus Sampson as Rowan[1] Sam Strike as Thale[1] Maya Eshet as Lommie[1] Brían F. O’Byrne as Auggie[1] Phillip Rhys as Murphy[1] Gwynne McElveen as Tobis[1]