The less-than-spectacular premiere week for Fox’s "American Idol" continued Thursday night, with the season’s second installment serving up a time zone-adjusted 3.9 average rating in the key 18-49 demo, based on Nielsen data.

TVbytheNumbers.com reports that the number was down sharply from the 4.7 turned in by Wednesday’s premiere, but was still enough to give Fox a comfortable win for prime time. CBS placed second with an all-repeat lineup, while ABC and NBC tied for fourth place among the broadcast nets with 1.0 averages for the night.

Going head-to-head with "Idol," ABC’s two-hour "The Taste" fell to a series-low 0.9 average in 18-49, losing four-tenths of a point from a week ago. A "Shark Tank" repeat on ABC at 10 p.m. did better, managing a 1.2.

NBC saw three series set or equal their all-time lows in the 18-49 demo. "Sean Saves the World" matched its lowest number, a 0.8, falling two-tenths from a week ago; "The Michael J. Fox Show" plummeted four-tenths to a 0.6, a new series low; and "Parenthood" equaled its low point with a 1.2, slipping one-tenth from a week earlier.

NBC’s "Community" fell three-tenths from the season high it hit a week ago, settling for a 1.1 average in viewers 18-49, while "Parks & Recreation" lost three-tenths to come in with a 1.2.

For prime time overall, Fox’s 3.9 average in adults 18-49 was the best number on broadcast, followed by CBS (1.5 average), Univision (1.2), and ABC and NBC (both 1.0). Fox was also well ahead in total viewers, averaging 13.4 million to lead CBS (7.2 million), ABC (3.4 million), NBC (3.14 million) and Univision (3.07 million).