The NCIS team must act quickly on next week's new episode of the show.

That's what happens when a North Korean assassin - billed as the best in the world below - from Vance's past resurfaces in town, ready to kill again.

Check out the official CBS preview for "Endgame," as well as a few images from the hour. Remember: TV Fanatic recaps and reviews each NCIS episode soon after it airs...

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

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