Juliet is infiltrating the Losties camp, but is supposed to return in a week.Why? What is her mission? I am pretty sure it has nothing to do with Claire. The incident with Claire was a ruse to get people to put trust in Juliet. So what is she up to? It would seem to me that she must be there to get close to Sun. Is she going to secretly inject her with something or simply find a way to take her away in order to continue her research? Will she find a way to impregnate someone else?.....Kate maybe?