In the first case, the Jeffersonian team investigates the death of a professional ballroom dancer who was murdered three days before her audition on a popular dancing competition show. In order to solve the case, Brennan (Emily Deschanel) and Booth (David Boreanaz) go undercover as dance competitors to see if they can find potential suspects.

Then, the team investigates the murder of a well-known archeologist with a questionable reputation, who came upon a career-defining discovery right before his death in the special, all-new “The Diamond in the Rough/The Archaeologist in the Cocoon” two-hour episode of BONES airing Monday, Jan. 14 (8:00-10:00 PM) on FOX 50. (BON-806/7) (TV-14 D, L, V) 

Cast: Emily Deschanel as Dr. Temperance Brennan; David Boreanaz as FBI Special Agent Seeley Booth; TJ Thyne as Dr. Jack Hodgins; Michaela Conlin as Angela Montenegro; Tamara Taylor as Dr. Camille “Cam” Saroyan; John Francis Daley as Dr. Lance Sweets 

Guest Cast: Michael Grant Terry as Wendell Bray; Sarah Scott as Laila Serrano; Marta DuBois as Maureen Serrano; Dmitry Chaplin as “Kendrick Mantorov/Choreographer; Andres Perez-Molina as Tommy Kentner; Tyce Diorio as himself; Mary Murphy as herself; Vai Tiare Au-Harehoe as Blossom; Alison White as Registrar; Vincent Corazza as Palmer Heston; Harrison White as Janitor; Chehon Wespi-Tschopp as Rocko; Eliana Girard as Katarina; Eugene Byrd as Dr. Clark Edison, Anya Monzikova as Marina Sutton; Zoran Korach as Artur Tovah; Joesph Williamson as Man; Gary Grubbs as Wayne Wilson; Amy Yasbeck as Diana Malkin.

BONUS CLIP #1: From "The Diamond in the Rough," Booth teaches Brennan the Rumba, the dance of passion.

BONUS CLIP #2: From "The Archaeologist In The Cocoon," a corpse wrapped in a massive cocoon prompts Brennan and Hodgins to debate the existence of a Mothman creature.