With “Heroes” on hiatus, CBS claimed a Monday night victory thanks to three of its four comedies. “The Class,” “Two and a Half Men” and “Old Christine” had their best performances in weeks and won the night for CBS by a whole ratings point. But the two CBS programs that bracketed that lineup, “How I Met Your Mother” and “CSI: Miami,” had season lows.

“Mother” started CBS’s night at 8 p.m. with a 3.0 rating among adults 18 to 49, according to preliminary Nielsen Media Research data. “Mother” was pre-empted in about 2 percent of the country, which might have affected its viewership.

“The Class” had a 3.1, its best rating in nine weeks and a higher number than “Mother” for the first time ever. “Men” had a 5.2, making it the highest-rated show of the night. “Christine” (4.2) hit a 10-week high. Then “Miami” crashed the party with a 4.8, its lowest rating ever.

In second place, NBC had “Deal or No Deal” (4.5) and a movie. Third-place ABC had a rerun of “Wife Swap” (2.7), then “Supernanny” (3.3), which was down 13 percent from last week’s premiere, and an average “What About Brian” (2.5). Fox was fourth with two “House” repeats. The CW had its comedy block, which averaged a 1.2.