The success of NCIS Season 15 marks the continuation of a nearly ten-year streak for the series.
Six years after its debut, NCIS became the top-rated scripted drama on television during the 2009-2010 broadcast season.
It is a streak it has held for nearly ten years now, and it shows no signs of being broken any time soon.
Since its debut season, the series has never dipped below a season average of 11 million viewers, which many series would currently need to be considered a moderate success.