When two workers open a crypt in the mausoleum of a fictional national cemetery in Virginia (to prepare for the interment of the remains of a young Marine in the family vault), the tomb explodes; Gibbs and company investigate; Ducky explains the physics of the explosion, and he later, after reassembling assorted parts of at least three skeletons from the chamber, suggests that Gibbs needs to start seeking a mass murderer. Abby, in a lousy mood, says that the parts are from five different people. Gibbs and Hollis open two more crypts and find more parts. The team identify and check out a suspect, and Gibbs and Abby work out a problem, then Gibbs and Hollis get a major surprise.
—DocRushing