A lot of people were watching television Tuesday night. The season finale of NCIS was the most watched, with 19.05 million viewers, according to final figures from Nielsen Research. Its sibling spin-off NCIS Los Angeles captured 15.19 million viewers, despite airing opposite Dancing With The Stars with 13.23 million. America's Got Talent, though down in viewers compared with last season's numbers, Nevertheless counted 10.58 million viewers. So with all those people watching the major networks, where did that leave the cable networks? Well, in the case of CNN, virtually deserted. In the case of Piers Morgan Tonight, viewership plummeted to 284,000, with just 39,000 in the 25-54 age group. Fox News was also down, with 1.7 million tuned in for Sean Hannity, while over at MSNBC Rachel Maddow attracted 839,000.