[Derek definitely has his ups and downs with Kitty, but he doesn't think she's a bad person, even tries to know her better and understand her better. It's a tentative friendship, so he really is glad she showed.]
Right. And the way I see it, there's probably some obsessive types even here in the dome. Good to understand where they come from in case something happens. Even trying to get outta here could become an obsession. [And of course now he's imagining all the ways that could go terribly wrong.]