If there were one TV law enforcement official who could credibly infiltrate a Mixed Martial Arts league in an undercover mission to find a killer, it would be NCIS Special Agent Sam Hanna.

He's a former Navy Seal, after all, and LL Cool J would likely fare well in a real-life MMA fight this afternoon if you threw him in the ring. Anyway, that's Sam's mission tomorrow evening.

When NCIS: Los Angeles returns after a three-week layoff, he and Kensi try to assimilate into the world of MMA in hopes of uncovering who killed a Naval officer. Sounds action-packed!

Here's a special behind-the-scenes promo of Tuesday's "Hand to Hand" ...

[video url="http://www.tvfanatic.com/videos/hand-to-hand-special-preview/" title="Hand to Hand Special Preview"] [/video]

It'll be great to have NCIS and its spinoff back this week. Click to enlarge some photos of Sam and Kensi (Daniela Ruah) mixing it up in the ring on tomorrow night's episode below:

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