On Tuesday's new episode of NCIS: Los Angeles, the team investigates the killing of a Marine.

This leads Callen and company to a militia group, one that has swiped a set of missiles.

Without giving away any NCIS: Los Angeles spoilers from the installment, we've posted the official CBS promo and a few images from it below:

[video url="http://www.tvfanatic.com/videos/ambush-promo/" title="Ambush Promo"] [/video]

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.