Excluding anthology series from the early years of television that featured different stories and characters every week, fewer than 15 primetime scripted TV shows have ever reached 300 episodes. And on March 15, 2016, the long-running CBS Navy crime drama "NCIS" joins them.
Since its inception in 2003, "NCIS" has maintained both a huge American audience and four of its original cast members (Mark Harmon, Michael Weatherly, Pauley Perrette and David McCallum). Sean Murray joined the cast partway though Season One.
This 300-episode milestone is even more impressive when one considers the fact that "NCIS" is a one-hour program, and that it is still - in its 13th season - the number one drama on TV.