Guest Stars Kathleen Choe as Subject 3 Danny Hoch as Subject 5 Stephen Hill as Subject 7 James Monroe Iglehart as Orderly Carl Allyce Beasley as Subject 11 Julia Garner as Ellie Landsberg Billy Magnussen as Grimsson Lev Gorn as Sokolov 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