The death of female conjoined twins who worked in the circus is investigated. The investigation leads Brennan and Booth to go undercover as a Canadian knife-throwing act, and also causes Booth to come face-to-face with a clown.
"David said: "Do they have sex? Not that I heard of! But I think it may happen through a fantasy episode, but I don't think آپ get to see us having sex. It's nice to see them so vulnerable because they don't want to get so close to each other."
