NCIS is back tomorrow night following a three-week layoff with the first of five new episodes to finish off the seventh season. Here's a preview of the first one, "Moonlighting."

When an NCIS polygraph specialist's night job takes a surprise turn, Gibbs, McGee, DiNozzo and the team have to uncover the truth ... and Gibbs ends up taking a polygraph.

Why? We don't know yet. But for whatever reason, it looks serious, and our man in charge does not look pleased when the line of questioning heads in a certain direction.

Here's CBS' first promo, plus a minute-long sneak preview clip ...

[video url="http://www.tvfanatic.com/videos/moonlighting-preview-extended/" title="Moonlighting Preview: Extended"] [/video]

What do you think lands Gibbs in the hot seat? Do you have any theories on how this season will play out? Follow the jump for photos from tomorrow's episode as well ...

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