As the 2017-18 TV season winds down this week, NBC is walking away with the 18-49 demo win for the second straight year, marking its fourth victory in the past five seasons. The network is finishing the season as the most-watched network among the 18- to 49-year-olds most coveted by advertisers, with a 2.2 rating,… http://www.adweek.com/tv-video/the-super-bowl-and-winter-olympics-help-nbc-repeat-its-season-win-in-the-18-49-demo/