Kicking off its seventh season, the summer reality contest - which saw the return of Mia Michaels and Adam Shankman to the judging panel - brought in a larger audience than last year's season premiere and drew a convincing 3.0 rating with adults 18-49 between 8pm and 10pm.
So You Think You Can Dance - which rose from 7.5m in the first half hour to 8.7m by the last half hour - was dented by FlashForward. The sci-fi drama, which was axed by ABC for its low viewing figures, fell to just 4.96m for its series finale.
'Future Shock' - during which the characters discovered whether their visions had come true - nearly equalled its previous series low, and shed approximately 400k week-on-week.
Elsewhere, the launch of NBC's 100 Questions put in a woeful 2.52m at 8.30pm, and a one-off documentary - Hollywood Salutes Matt Damon - averaged only 3.35m for ABC in the 9pm hour.
CBS's 10pm Mentalist pulled in a hefty 9.95m at 10pm, making it the night's most-watched programme. On The CW The Vampire Diaries and Supernatural lured 1.8m and 1.45m at 8pm and 9pm respectively.
Meanwhile, The Office mustered 2.99m and 2.63m for NBC its two airings at 9pm and 10pm. Community managed 2.98m at 8pm, 2.83m watched 30 Rock at 9.30pm, and Parks & Recreation logged just 2.34m at 10.30pm.