Interstellar (Christopher Nolan, 2014). Time, as Tarkovsky said, is the material of cinema. And sometimes it is also its subject, as Christopher Nolan showed us in Memento, The Prestige, Inception and now in his ambitious, optimistic, anti-nostalgic and deeply (uncharacteristically?) sentimental space epic, Interstellar. Fathers and daughters, worm holes and extra dimensions, and moments that would impress both Shyamalan and, yes, Tarkovsky.