CBS’ brand new series “Tracker” has quickly emerged as the season’s most-watched entertainment series, according to Nielsen’s Most Current data . The second episode of the series (aired Sunday, February 18) amassed nearly 13 million viewers since it first aired, but the premiere episode, which launched on Super Bowl Sunday (February 11), has now been watched by 30 million multiplatform viewers . Other series joining the club include the season premieres of “NCIS” (11.5 million), “Young She