NBC grabbed a demo victory on Monday, although preliminary Nielsen ratings for individual programs on all nets were subject to change given President Bush’s roughly 15-minute speech at the outset of primetime in most of the country.

The Peacock’s “Third Watch” (5.3/12 in adults 18-49, 12.9 million viewers overall) and “Crossing Jordan” (4.6/12 in adults 18-49, 11.8 million viewers overall) led their slots in the demo from 9 to 11 with some of their better scores of the season. And from approximately 8:19-9 p.m., a repeat of “Fear Factor” led its time period (about a 6.4/15) with what’s likely its highest rating ever for a rebroadcast.

ABC, which preempted its low-rated entertainment programming on the night for three hours of news related to the impending war in Iraq, will likely double its 18-49 average from a week ago.

Preliminary 18-49 averages for the night (which include coverage of the president’s speech): NBC, 5.5/13; CBS, 4.5/13; ABC, 4.4/13; Fox, 3.3/8.

In total viewers: NBC, 13.7 million; CBS, 13.0 million; ABC, 12.8 million; Fox, 7.1 million.