Here are the national TV ratings winners (for all persons 2+) according to BBM/Nielsen — Feb. 19-25.

Monday: Global’s Prison Break averaged a healthy 1.3 million viewers for the 8 p.m. timeslot, but it couldn’t beat CTV’s Corner Gas, which raked in 1.5 million. In the 9 p.m. timeslot, Global’s 24 took the crown with 1.5 million, as CTV’s Law & Order: CI came up slightly shorter with 1.4 million. At 10 p.m., CTV took control again, with a 2.6 million average for CSI: Miami.

Tuesday: CTV’s American Idol lost a little more steam but still kept the 8 p.m. timeslot with 2.5 million (down from 2.9 million one week earlier and 3.2 million the week before that). Global’s House won the 9 p.m. timeslot with 1.4 million, almost half the audience it achieved the previous week. CTV took the 10 p.m. timeslot with Law & Order: SVU, which raked in 1.8 million viewers, down from 1.9 million in the previous week.

Wednesday: American Idol on CTV took the 8 p.m. timeslot with 2.5 million viewers, a slight gain over the previous week. CTV’s Lost got 1.1 million in the 7 p.m. timeslot. CTV’s CSI: NY won the 10 p.m. timeslot with another falling average — 2.5 million, compared to 2.6 million the previous week (and 3.3 million the week before that).

Thursday: The primetime battle for the 9 p.m. timeslot crowned CSI, the reigning champ, with an average 2.8 million viewers, the highest numbers of the night (but a loss of nearly half a million from the previous week’s charts). Global’s Deal or No Deal clocked 1.6 million in a 9 p.m. fight for viewers. The night’s second highest numbers, a nearly consistent 2.2 million average, went to CTV’s Grey’s Anatomy at 7 p.m. Global’s Survivor: Fiji won the 8 p.m. timeslot with two million viewers against CTV’s American Idol Special, which clocked a close 1.9 million. The Thursday 10 p.m. fight saw CTV win with 1.7 million viewers for ER, as Global’s Shark drew 1.1 million. Numbers for both ER and Shark were down by about 200,000 from the previous week.

Friday: CTV’s Ghost Whisperer got the highest Friday night numbers again, with 1.7 million viewers in the 8 p.m. timeslot, up from 1.5 million the previous week. CTV’s Law & Order audience stayed consistent with 1.4 million viewers in the 10 p.m. timeslot. And the 9 p.m. timeslot, making CTV a clean winner for the night, went to Close to Home, which averaged around 975,000 viewers.

Saturday: CBC’s Hockey Night in Canada netted the night again, but lost some steam from the previous week. The first Feb. 24 game, which saw the Maple Leafs take the Philadelphia Flyers, lured an average of 1.3 million viewers, down from Feb. 17, which had 1.7 million tuning in for the all-Canadian Leafs-Edmonton Oilers match-up.

Sunday: CTV’s Academy Awards, stretched between 8:30 p.m. and 12:19 a.m., clocked an average of 4.9 million. The chart’s number-two spot goes to Road to the Oscars, which averaged 3.2 million in the 8 p.m. lead-in timeslot. And the Barbara Walters Oscar special, in the 7 p.m. timeslot, averaged 2.2 million viewers.

For lists of the top 30 TV shows nationally and by region for the week, according to BBM/Nielsen, please click the links below:

National