When a Marine photographer disappears prior to providing testimony to an army court-martial hearing, the NCIS team must investigate both the murder he witnessed and a current project centred on military veterans who are homeless in the DC area.
Callen goes undercover at a prestigious high school to track down a teenaged hacker who is compromising missions.
In order to find a group of jewel thieves, Lisbon must channel her inner Patrick, who is too sick to investigate.
Mac travels to Nevada to surprise his girlfriend Christine, but when he discovers she is missing, he asks the Las Vegas team for help.
Charlie contacts Sam and Dean after she finds the book of the dead -- which could help eliminate the mark of Cain; Castiel and Metatron look for Castiel's grace.