Guest Stars Kathleen Choe as Subject 3 Danny Hoch as Subject 5 James Monroe Iglehart as Orderly Carl Allyce Beasley as Subject 11 Stephen Hill as Subject 7 Julia Garner as Ellie Landsberg Lev Gorn as Sokolov Billy Magnussen as Grimsson Sean Meehan as General Nathan Banner Co Starring Sejal Shah as Medical Tech Dai Ishiguro as Head Control Tech Alexandra Curran as Holly Milgrim Cailin Loesch as McMurphy Twin Hannah Loesch as McMurphy Twin Lukas Hassel as Danish General Louis Arcella as TBD Uncredited Sally Field as Gertie Neberdine