Hunt leaves for the evening and wishes Mama S a good night but she jumps out of her chair to ask him if he's sleeping. He's confused and stutters as he tries to get out of the conversation but she just plows ahead to suggest valerian root since it helps her when she has trouble sleeping. She's been there less than a day, but she's the only one who has figured out that Hunt might have some post-war problems. She then asks again if he's been sleeping since he came back, but he unconvincingly tells her he's fine and takes off.
Derek is checking out a half-awake Eric, who is asking why he won't just let him die. Derek will only growl, "You aren't dying here," and Eric asks if what he's afraid of is losing control. Derek ignores him and gives Cristina and Mere various labs to take care of, but when they leave Eric continues to nag at him. He muses that maybe it's because deep down, "You know you're no better than I am. You decide who lives and dies all the time but for you they call it medicine, not a capital offense." And while this isn't true, because Derek doesn't decide whose life he's going to save that day (well, with the exception of this one) he's so worked up that he lets Eric push every one of his buttons. He spits back that no one gets to choose, especially not the women he killed, "So when I say you're not going to die in this hospital, I mean there is no way in hell I will let you die in this hospital. You don't get off that easy. I'm nothing like you." He's a modern-day insecure vigilante, really.
Mama S walks up to Mere and tells her that she was looking for Derek and thought maybe she'd be with him? Mere looks at her, unsmiling, and contemplates how best to live up to her own low expectations and prove herself to be a dark and stormy person. Mere tells Mama S that she's been kind and given Mere a chance and even seems to want to like her, so it's fair that she should show off her completely inability to interact socially with someone who has a happy family. Except she puts that as saying the pink ponytail and the smiling are fake, and she's not a girl that mothers like. She's not happy, she's dark (blah blah blah you know this drill) and she's the kind of person who feels bad for serial killers. Mama S furrows her brow at this and after a moment, says it was very nice to meet her and leaves. Izzie walked in and saw the exchange, and just shakes her head at Mere in disappointment like Mere did something to Izzie personally.