Two Houses, Both Alike: In a scene that fuses two moments across two centuries, 19th-century math prodigy Thomasina (Bel Powley, left) and her tutor Septimus (Tom Riley) flank the central table of Arcadia's set, joined in the center by the present-day Valentine (Raul Esparza) and Hannah (Lia Williams). (Carol Rosegg)
