Thought all you guys over here would appreciate this!

"Next season’s fourth episode is titled “Indifference” and will introduce us to two new survivors, Jack and Erin. Both are in their 20s and described as easygoing and “extremely thin.” Jack’s a bit of a joker, while Erin walks through life with rose-colored glasses."

http://tvline.com/2013/06/04/castle-season-6-spoilers-castle-beckett-ask-ausiello/