NBC’s psychic drama “Medium” got off to an impressive start Monday, significantly improving the net’s showing on the night and nearly matching the demo deliveries of timeslot rival “CSI: Miami” on CBS, according to preliminary nationals from Nielsen. CBS still won the night by most key measures.

From 10 to 11, the premiere of Patricia Arquette starrer “Medium” (6.3/16 in adults 18-49, 16.1 million viewers overall) grabbed the Peacock’s best numbers for a drama bow since “Ed” in October 2000, more than doubling the net’s timeslot averages for previous occupant “LAX.” It sent CBS powerhouse “CSI: Miami” (slot-leading 6.6/16 in adults 18-49, 18.2 million viewers overall) to one of its lowest firstrun scores in a while and pulled even with “CSI: Miami” in 18-49 in the 10:30 half-hour (6.6/17).

NBC also did well with “Fear Factor” (4.5/12 in adults 18-49, 11.0 million viewers overall) and “Las Vegas” (5.0/12 in adults 18-49, 13.1 million viewers overall), while CBS received typically strong results from comedies “Everybody Loves Raymond” (6.4/15 in adults 18-49, 18.9 million viewers overall) and “Two and a Half Men” (6.2/15 in adults 18-49, 18.2 million viewers overall).

Reliable prelim nationals weren’t available for ABC’s coverage of college football’s Sugar Bowl game between Auburn and Virginia Tech, but the net is expected to finish a solid No. 3 on the night in most categories and the leader in male demos.

Fox, meanwhile, bombed with its titillatingly titled and much-derided 90-minute spec “Who’s Your Daddy” (2.3/6 in adults 18-49, 6.3 million viewers overall).

Preliminary 18-49 averages for the night: CBS, 5.5/14; NBC, 5.3/13; ABC, 4.6/11; Fox, 2.2/5; UPN, 1.5/4; WB, 1.0/2.

In total viewers: CBS, 16.1 million; ABC, 13.6 million; NBC, 13.4 million; Fox, 5.8 million; UPN, 3.5 million; WB, 2.8 million.