NCIS marks its 150th episode Tuesday (January 12), and as a special treat, Robert Wagner guest stars as Tony DiNozzo, Sr., in "Flesh and Blood." Tony Jr.? A little thrown off.

As for any major NCIS cast shakeups, it looks like we're in the clear next week.

Rocky Carroll (Director Leon Vance) assured fans of the milestone episode: “The one thing I can tell you is that there are no surprises. We all live to make it to Episode 151.”

Here's the cast members' take on the 150 episodes already in the book and the 150 more they still hope to make, along with some scenes from next week's big show:

[video url="http://www.tvfanatic.com/videos/ncis-cast-on-150th-episode/" title="NCIS Cast on 150th Episode"] [/video]

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