CBS’s Big Brother posted year-to-year gains in viewers (6.64 million), adults 18-49 (2.3) and 18-34 (1.6) in its 8-9 PM season debut Wednesday — not surprisingly finishing as the night’s most watched program in overall audience and in both demos. Followed by reruns of Criminal Minds (1.3/4, 6.17 million) and CSI (0.8/3, 5.35 million), the network took Wednesday.

NBC’s two-hour America’s Got Talent repeat (1.3/5, 6.2 million viewers) gave BB its stiffest competition in overall crowd, but Fox’s So You Think You Can Dance (1.4/5, 4.38 million) came closest in the demo, though Dance was down 18% from last week’s season high in adults 18-49 (while managing to hand Fox a win in all key female brackets). Talent, meanwhile, churned up NBC’s biggest overall audience in its slot since April 9.

At 10 PM, NBC’s debuting Taxi Brooklyn (1.0/3, 5.42 million) won its hour among broadcasters in the demo, in adults 25-54 and in total viewers. But, in the demo the debut came in 38% shy of NBC’s most recent summer debut — the late May launch of Night Shift (1.6/5), and and 33% short of last July’s debut of Camp in the time period.