The team investigates the death of female conjoined twins who were in the process of deciding to get separated or not. The twins were working in a circus, which means that Booth will come face to face with a clown during the investigation. Brennan and Booth go undercover as Wanda and Buck Moosejaw, Canadian performers in a knife-throwing act. Sweets helps Brennan and Booth understand Circus lingo. (wikipedia.org)