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. Angela, Hodgins, Cam and Vincent Nigel-Murray appear.

Hockey legend Luc Robitaille guests in the episode where the body of a fireman is discovered in a lake and Booth is one of the suspects. The victim and Booth played hockey together. The investigation is conducted by FBI Agent Payton Perotta, who will interrogate none other than Booth himself. Bones will try figure skating.