Falling Skies RatingsTNT‘s sci-fi drama series Falling Skies, which launched as basic cable’s No. 1 new series in adults 18-49 last year, returned for its second season last night with 4.5 million total viewers, down 24% from its series debut. In adults 18-49, it drew 1.9 million viewers, down from 2.6 million last year. Falling Skies faced stiff competition last night from the strong NBA Finals, which also took a toll on USA Network’s Suits‘ second-season premiere last week as well as the season finales of AMC’s The Killing, Showtime’s The Borgias and HBO’s Girls, among others. Falling Skiesratings result was potent enough to make a third season renewal very likely.