Penultimate episodes can catapult a series into the stratosphere, signaling an epic season finale to come, and that is exactly what “And Hell Itself My Only Foe” does. From the moment it begins until the shocking end, you find yourself on a dark roller coaster of emotions. With Sir Malcolm (Timothy Dalton) in danger, Ferdinand Lyle (Simon Russell Beale) suggests to Victor Frankenstein (Harry Treadaway) and Sembene (Danny Sapani) that they quickly find Vanessa (Eva Green) and Ethan (Josh Hartnett) to help save him. Meanwhile, Lily (Billie Piper) and Dorian (Reeve Carney) explore the unique possibilities of their new friendship.