PA: Viewer discretion is advised.

THE RELEASE OF A DEADLY VIRUS FORCES BRENNAN, BOOTH AND THE JEFFERSONIAN TEAM TO BE QUARANTINED IN THE LAB OVER CHRISTMAS ON �BONES� WEDNESDAY, DECEMBER 20, ON FOX

Construction workers find a skeleton in an old fallout shelter from the 1950s and the Jeffersonian is brought in to help identify the remains. When Zack cuts into the bone, he accidentally releases spores of the deadly fungus Valley Fever, causing the team to be quarantined in the lab over Christmas. While everyone tries to maintain the holiday spirit, Brennan buckles down to solve the mystery of the fallout shelter. Booth and Brennan�s team are reminded that this is a rough time of year for Brennan, since her parents went missing right before Christmas when she was a kid. As Brennan works to bring closure to the family of the missing man � something she has yet to receive about her own parents � the time spent together in the lab provides the catalyst for revealing information about all of them in �The Man in the Fallout Shelter� episode of BONES airing Wednesday, Dec. 20 (9:00-10:00 PM ET/PT) on FOX. (BON-109) (TV-14)

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, Eric Millegan as Zack Addy, Jonathan Adams as Dr. Daniel Goodman.

Guest Cast: Heavy D. as Sid Shapiro; Jim Ortlieb as Hal; Margaret Avery as Ivy Gillespie; Christina Copeland as Lisa Pearce; Ty Panitz as Parker; Bob Bouchard as Mr. Addy; Billy Gibbons as Angela�s Dad.