I almost forgot about her. Remember she got left in the crappy future? I found this quote:
Don't expect Peter to ever again reference his season-two love interest, whom the super-compassionate male nurse abandoned to a nightmarish alternate future. From IGN.com's report on the presentation: When the fan asked if Peter would ever acknowledge Caitlin or express any grief over what seems to be her dire fate, Kring replied, "No, we passed it. We leapfrogged it." He added that when the idea of returning to Caitlin was brought up, they asked, "Really? Are we going to risk that? We have enough stuff to [deal with]."Guess Peter's a jerk.