Against modest competition, the series premieres of “Brooklyn Nine-Nine” and “Dads” helped deliver Fox a victory in Tuesday’s primetime ratings.

Bowing ahead of the fall premieres of shows on rival networks, the heavily promoted “Brooklyn” scored a 2.5 rating and 8 share among viewers 18-49, according to preliminary nationals from Nielsen, and 6.0 million viewers overall. That placed it ahead of the series premiere in the same 8:30 p.m. timeslot of “Ben & Kate” (2.1/6), though that show debuted in the more conventional premiere week a year ago.

The controversial “Dads” (2.1/7, 5.6 million), battered by critics ahead of its opener, nevertheless also debuted ahead of its 8 p.m. timeslot competition, which included the first hour of “Iron Man 2” on ABC, the latest editions of “Million Second Quiz” on NBC and “Whose Line Is It Anyway?” on the CW and a rerun of “NCIS” on CBS.

Fox also offered the season premieres of “New Girl” (2.9/8, 5.6 million), virtually even with its Sept. 25, 2012 season premiere, and “The Mindy Project” (1.9/5, 4.0 million), which declined from its series premiere a year ago despite the presence of guest actor James Franco. However, the show was ahead of its 2012-13 season average (1.5/4) in the demo.

“New Girl” and “Mindy” faced more challenging competition that their 8 p.m. hour counterparts, going up against NBC’s “America’s Got Talent.”

The hurdles will be much bigger for Fox’s Tuesday comedies in a week, when they face the season premieres of NBC’s results show for “The Voice” and CBS’ “NCIS” and “NCIS: Los Angeles,” as well as the series premieres of ABC’s “Marvel’s Agents of SHIELD,” “The Goldbergs” and “Trophy Wife.”

NBC finished second on the night in the demo and first in overall viewers, thanks in large part to “Talent” (2.4/7, 10.9 million) edging Fox at 9 p.m. and dominating ABC and CBS. “Talent” had its biggest draw of overall viewers since June 18. The Peacock’s night began with “Million Second Quiz” (1.1/4, 5.2 million).

Taking the 18-49 bronze medal Tuesday was ABC with its three hours of “Iron Man 2” (1.2/4, 3.8 million), ahead of CBS’s three drama reruns: “NCIS” (1.3/4, 10.4 million), “NCIS: Los Angeles” (1.1/3, 7.9 million) and “Person of Interest” (1.0/3, 6.2 million).

Rounding things out for the English-language broadcasters was the CW with an hour of “Whose Line” (0.8/3, 2.4 million) and “Capture” (0.5/1, 1.1 million).

Preliminary 18-49 averages for the night: Fox 2.3/7, NBC 2.0/6, Univision 1.4/4, ABC 1.2/4, CBS 1.1/3, CW 0.6/2.

In total viewers: NBC 9.0 million, CBS 8.1 million, Fox 5.3 million, ABC 3.8 million, Univision 3.4 million, CW 1.7 million.