Air date: 4/16/09

When a skeleton is found being used as a stage prop for a Black metal band in Norway, authorities call the FBI upon discovering that the man, a bassist with the stage name Mayhem, is a US citizen. The investigation into underground extreme metal bands brings to light the teams' own surprising musical preferences and new information about Sweets' past. Meanwhile, Dr. Gordon Wyatt is back, helping Sweets write his book on Booth and Brennan by giving him a perspective on their relationship.

The Double Death of the Dearly Departed

Air date: 4/20/09

When a colleague from the Egyptology department dies of heart failure, Brennan realizes at the wake that the death was not an accident. Brennan convinces Booth to steal the body so she and Cam can investigate. The true cause of death is baffling, and the suspects are as confusing as the death itself. Cam runs into trouble when she attempts to get Michelle, her newly adopted teenager, to stop smoking.

The Girl in the Mask

Air date: 4/23/09

When the head of Sachi Nakamura, the sister of Booth's friend, is discovered in Washington, D.C., her brother Ken, a detective from Tokyo, flies in to aid the search for his sister's killer. The investigation leads to an elite escort service, and the team must race against the clock when Sachi's roommate is missing as well.

The Beaver in the Otter

Air date: 4/30/09

Jimmy 'Beaver' Bouvier is found strung up in the costume of his college mascot, an Otter. Booth and Bones must investigate whether he was dead beforehand or killed during a Middlesex University bonfire event.