Bones (4.21): The Mayhem on the Cross

Brennan and Booth delve into the world of death metal music in an effort to discover who killed the bassist of an underground death metal band, whose skeleton was found being used as a stage prop by another death metal band in Norway. Meanwhile, Sweets is working on the book he's writing about Brennan and Booth, and asks Dr. Gordon Wyatt for some input.

Air Date: Thursday, April 16, 2009

• When a real human skeleton is found being used as a stage prop for a death metal band in Norway, authorities determine the victim was an American citizen. The Jeffersonian team tracks the skeletal remains to an underground U.S. death metal band and identifies the victim as a bassist named Mayhem from a band called Spew.
• As Booth and Brennan venture into the unfamiliar world of death metal music to search for the killer and a motive, they learn about their own team's surprising musical preferences and gain new insight into Sweets' past. Meanwhile, when Sweets asks Dr. Gordon Wyatt (guest star Stephen Fry) for input on the book he's writing about Booth and Brennan, Dr. Wyatt lends Sweets an interesting perspective on the pair's unique relationship in the "Mayhem on a Cross" episode
• 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: Stephen Fry as Dr. Gordon Wyatt; Eugene Byrd as Clark Edison; Greg Roman as Murderbreath; Frank Pacheco as Mayhem; John Thomas as Wrath; Michael William Freeman as Grinder; AJ Trauth as Pinworm; Tania Raymonde as Lexi; Frida Farrell as Dr. Solberg; Thor Knai as Delta Unit Commander