How do you solve a crime when nothing is left to find?

Tomorrow night, the NCIS special agents must answer that as they uncover a discrepancy with DNA remains following the tragic crash of a military plane that had been transporting caskets.

On last week's episode, Diane alluded to Gibbs' first wife when she said Leroy was "her Shannon." It looks like this case will also bring back memories of the daughter Gibbs lost along with her.

Check out the trailer for part one of a two-part NCIS event below and tell us what you think will happen in "Engaged." The song playing is "Disaster Hearts" by I Fight Dragons ...

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.