Glass House RatingsJust like CBS’ failed 2003 attempt to block ABC’s short-lived Survivor-esque I’m a Celebrity… Get Me Out Of Here, CBS’ unsuccessful legal challenge to ABC’s Big Brother-like The Glass House may have been much ado about nothing. Despite extra publicity from the legal tussle, the new ABC reality series opened modestly last night with a 1.6/4 among adults 18-49 at 10 PM, following The Bachelorette (2.3/7, flat with last week). Compared with last summer’s debut of Extreme Makeover: Weight Loss Edition in the same time period, Glass House was down 33%, and it may be adjusted further down in the finals as its fast nationals include a Bachelorette overrun.

NBC’s America’s Got Talent (2.8/9) was once again the top program of the night in 18-49 but was down 15% from two weeks ago for a season low. American Ninja Warrior (2.0/5) was down 9%. NBC (2.3/7, 7.6 million viewers) won the night in viewers. Fox (2.4/7, 5.6 million) edged NBC for a nightly win in 18-49 with Gordan Ramsay’s Hell’s Kitchen (2.5/8) and MasterChef (2.3/6) both down from last Monday by 11% and 15%, respectively. CBS aired reruns.

Over at HBO, the second episode of True Blood on Sunday drew 4.42 million total viewers, down 15% from the season premiere. the Season 1 finale of Girls (1 million) was up 15% to log its second most watched telecast as it moved from its regular 10:30 PM slot to 10 PM where it immediately followed the highly-rated True Blood.