VIDEO : ?America?s Got Talent? and ?Big Brother? Tie For Viewers

According to SFGate, ?America?s Got Talent? dominated Wednesday in terms of overall viewers, but the NBC competition show tied CBS? ?Big Brother? in the key ratings demo.
NBC was first in ratings with a 1.3 rating/6 share in the advertiser-coveted 18-49 demographic and in total viewers with an average of 6.6 million, according to preliminary numbers.
AGT? at 8 p.m. earned a 1.5/7 and 9.8 million viewers. A two-hour ?World of Dance,? which started at 9, posted a 1.1/6 and 5.1 million viewers.