(Relaxnews) - The CBS drama "NCIS" topped the latest list of the most-watched programs on American broadcast TV once again this year.

Since the launch of its 11th season on September 24, "NCIS" has drawn an average 21.83 million viewers on CBS. The investigations of the charismatic and virtuous Leroy Jethro Gibbs attracted only slightly more viewers than NBC's "Sunday Night Football," which was watched by 21.28 million Americans each week on average.

In third place, just as in 2012, "The Big Bang Theory" attracted 21.27 million fans on average. The "NCIS" franchise takes up another slot in the ranking in fourth place through its spin-off "NCIS: Los Angeles," watched by 16.84 million TV viewers per week.

Entering the ranking in fifth position, "The Blacklist" is the only new series in the top ten. The drama starring James Spader as a criminal mastermind drew 16.57 million viewers, outperforming "Person of Interest," whose third season was watched by 15.99 million viewers on average.

Reported by Tvline.com and Entertainment Weekly, among other sources, the ranking is based on TV ratings from September 23 to December 15.