PA: Viewer discretion is advised.

BRENNAN AND BOOTH INVESTIGATE THE DEATH OF AN AMERICAN SOLDIER WHO SERVED IN THE IRAQ WAR AND A POTENTIAL MILITARY COVER-UP ON "BONES" WEDNESDAY, MAY 10, ON FOX

Booth and Brennan investigate the apparent suicide of a protester in Arlington National Cemetery. But Brennan and her team discover this was not suicide, it was murder, and the victim was a soldier who had served in Iraq, not a war protester as originally thought. Booth and Brennan pursue the murder investigation and interrogate the American soldiers the victim served with in Iraq. Their investigation leads to many unanswered questions about the victim's military unit in Iraq and the actions they took while on patrol there. As they uncover more information about the case, all clues point to a potential military cover-up. Meanwhile, Booth laments the horrors of war and his own shady past as a military sniper in "The Soldier on the Grave" episode of BONES airing Wednesday, May 10 (8:00-9:00 PM ET/PT) on FOX. (BON-121) (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, Eric Millegan as Zack Addy, Jonathan Adams as Dr. Daniel Goodman.

Guest Cast: Adam Lieberman as FBI Agent; Cyd Strittmatter as Tina Kent; Eddie Allen as Bradley Kent; Monnae Michaell as Regina Marshall; Jasmine McNeal as Kiara Marshall; Aldis Hodge as Jimmy Merton; Erica Tazel as Karen Merton; Mitch Longley as Hank Lutrell; Matt Battaglia as Captain William Fuller; Stacy Hogue as Private Jody Campbell; Kirk B.R. Woller as Peter Lefferts; Rick Fitts as Col. Phillip Seymour Shore.