NCIS: Los Angeles has really come into its own these past few weeks, and tomorrow night's episode looks like another solid one. An intense one, too, even by Callen standards.

You don't hear "unacceptable risk level" often when it comes to these undercover agents, but it looks like even Sam and G may be in over their heads here. AK-47s are no joke!

The investigation into a drive-by shooting sends the NCIS special projects team searching Los Angeles far and wide for the dead marine's younger brother, who they believe may be the next target of a hit and the person with the answers they need.

Here's CBS' promo for "Blood Brothers" ...

[video url="http://www.tvfanatic.com/videos/blood-brothers-promo/" title="Blood Brothers Promo"] [/video]

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