NCIS returns from a three-week hiatus to air what looks like an emotional Christmas episode tomorrow.

After a Navy Captain is murdered in his hotel room, the team has to find his companion and protect her from unknown assailants ... Russian mercenaries who want to take pregnant Marine's unborn child.

It's Christmas Eve, of course, and before the night is over, will our fearless leader deliver the biggest miracle of all? It certainly appears, based on CBS' teaser below, that he'll do all he can under extreme duress.

Meanwhile, Jimmy brings his future father-in-law (guest star Larry Miller) to work. Should be fun.

Check out the promo for the aptly-titled "Newborn King" below and share your comments:

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