NCIS returns tonight with an all-new episode, "Mother's Day." The actual holiday may not be for a few months, but it comes early for Leroy Jethro Gibbs this evening.

Our favorite special agent and man of few words must revisit a horrible chapter in his life when his ex-mother-in-law plays a role in the latest murder investigation.

Gibbs, of course, has three former mothers-in-law. This is the mother of his deceased ex-wife, played by Gena Rowlands and then by Leann Hunley in flashbacks.

Check out CBS' preview for the episode below:

[video url="http://www.tvfanatic.com/videos/mothers-day-promo/" title="Mother's Day Promo"] [/video]

We've also posted episode stills from tonight, and you can follow jump for a sneak preview from "Mother's Day," in which something really stinks. Literally, in the lab.

Ducky tries to find out who or what is responsible ...

[video url="http://www.tvfanatic.com/videos/mothers-day-sneak-peek/" title="Mother's Day Sneak Peek"] [/video]

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