The Peacock Network's screening of women's gymnastics and swimming also grabbed a highly impressive 18-49 adults demo score of 11.4 in its slot between 7pm and 11pm.
Big Brother, one of only two other new programmes to air, dipped to 5.1m (1.8) in the 8pm hour on CBS.
The second episode of 3, meanwhile, could only muster 1.8m (0.5) an hour later on the Tiffany Network.
Popular repeats of Family Guy secured a runner-up place for Fox, with 3.1m (1.6) and 3.2m (1.5) for its 9pm hour double bill.
Meanwhile, ABC's highest-rated show was a rerun of Secret Millionaire, which had 2.9m (0.6) at 8pm.