AVClub: When it comes to thrilling dramas like Orphan Black, penultimate episodes can usually be more exciting than the finales they build to. Season finales become preoccupied with tying off loose ends, with delivering the payoff season-long arcs build to. There’s time in a penultimate episode to play around a bit. It’s your last chance to throw in twists for the finale to uncoil. Take last season’s “Things Which Have Never Yet Been Done” or the first season’s “Unconscious Selection.” Both were penultimate episodes that outperformed their finales with excitement, tension, focus.