Wow, was anyone not watching TV last night? Here are Monday's ratings milestones:

" While (of course) trailing Deal or No Deal, Prison Break (9.89 million total viewers) nonetheless returned to a season-high audience that was 300,000 heads larger than the show's Nov. 27 "fall finale."

" Also during the 8 pm hour, How I Met Your Mother (9.55 million) and The Class (8.99 mil, its best tally since Oct. 9) put up big numbers.

" In the popular serials' first-ever face-off, NBC's Heroes edged out Fox's 24, 14.84 million viewers to 14.44 mil.

" At 10, CSI: Miami, with 18.66 million viewers, had its second-best delivery of the season. Studio 60 (7.41 mil) was on par with its last fresh outing, and What About Brian (5.4 mil) was up 660K week-to-week.