4. The Devil/The Angel of Death
Easily one of the most fun things about the second season, Lily Rabe's wickedly wonderful turn as the sweet Mary Eunice who becomes possessed by the Devil and wreaks havoc and murder whilst rocking a nun's habit was the most fun on television - and it's something we'd love to see more of, even if we don't get Lily Rabe's scenery-munching, scene-stealing turn again. Obviously we wouldn't want it to be a complete retread of everything that's been done before, but battling against demons and devils is too good to resist. Or bringing back Frances Conroy as the Angel of Death, a couture-clad messenger of eternal rest and the ultimate badass. Either of those two darkly delicious roles please.