TV Guide Magazine went behind the scenes of NCIS' 200th episode this week, featuring the cast on three separate covers and interviewing with the cast and an inside scoop of the February 7 milestone event.

What can fans of TV's #1 drama expect as Mark Harmon's Leroy Jethro Gibbs looks back to the "roads not taken" and "a moment of mortal terror" where he "imagines a series of alternate-reality scenarios"?

A lot of familiar faces and surprises. Some quotes from the cast:

Smiling NCIS cast members Mark Harmon, Rocky Carroll, Brian Dietzen (!), Pauley Perette, David McCallum, Michael Weatherly, Cote de Pablo and Sean Murray take the cover of three collector's edition covers of TV Guide.

"The episode is about, what if things had been done differently? What if Abby and McGee were married?" - Sean Murray

"In my particular reality of the 200th episode...I've been running different missions all over Europe, and it's old Ziva - loud and in your face and sexual. It's a great scene, just between Michael and me, with the original tension all over again. So it poses the question: Is the attraction inevitable?" - Cote de Pablo

"I figured, hell, we'll make a few episodes. But I did get a sense right off the bat working with Harmon that he was a cagey veteran who seemed to know the direction in which we should head, all the time." - Michael Weatherly

"The network heads came by for a celebratory cake and [CBS Entertainment President] Nina Tassler said, 'We'll see you at the 300th cake cutting!' It was like, wait, what? That's four and a half years from now! ... That's longer than a presidential term." - Michael Weatherly

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