@Roberta,
I worry that Rob's paranoia might be his eventual downfall. He's pretty good (really good) at the outwit, outplay part, but hasn't in past seasons done so well at the tricky 'outlast' part. One of my favorite players of all time, two-time winner Sandra, never became paranoid. Rather, she was able to
cause it in others, always making the big moves and by standing up to Russell's bullying and getting in his face, she was able to outlast all of them.
I hope Rob doesn't go home with that immunity idol in his pocket.