[Nina] will "go through a big transformation this season, as she leaves the team and kind of falls off the wagon, and goes into what we call a 'push spiral'. Her ability is that she can mentally dominate people, get you to do what she wants. She starts using that to a pathetic and deeply troubling level, going around and pushing her way through life until she ends up getting anything she wants; robbing banks, doing all sorts of things. Our team has to sort of rescue her from the edge of that. It's a character that's such a fantasy fulfilment, to get anything you want. But it means that nothing you have means anything. We get to see that, that she has nothing in her life that means anything to her. It's just emptier and emptier. The more she pushes the emptier it gets. We find a way to bring her back, and through this story she finds a new way to look at her life and a new way to look at her role on the team and the people in her life. It's a very big journey."