Remember the “ghost killer” Pelant told Brennan about? You didn’t think that was just going away, did you? Much as I am ready for the show to move on from all Pelant-related matters, it seems we’re not there just yet: tonight Brennan becomes obsessed with that case – and the people around her don’t even necessarily believe it’s a real thing. And Kelly Rutherford guest stars! Here’s a promo and some clips from the hour.