Fast National ratings for Monday, Dec. 22, 2008.

Monday night was short on new programming and what fresh shows there were -- NBC's "Momma's Boys" and FOX's "Prison Break" -- were dismissed by viewers.

CBS was content with its rerun performance, winning the coveted 18-49 demographic with a 2.4 rating. ABC was second in the demo with a 2.2 rating, followed by FOX's 2.0 and the 1.7 rating for NBC. The CW's 0.4 rating trailed.

Overall, CBS averaged nearly 8.4 million viewers and a 5.5 rating/9 share to beat the 4.0/6 for ABC. NBC and FOX posted the same 3.5/6 for third, while The CW stayed last with a 0.8/1.

CBS won all three primetime hours, starting at 8 p.m. with a 4.6/8 for "Big Bang Theory" and "How I Met Your Mother." A "Today Looks Back at 2008" special was second on the hour with a 4.0/7, edging ABC's "Shrek the Halls" and FOX's "House," which tied for third. The CW's "Gossip Girl" was fifth with a 0.9/2.

At 9 p.m. CBS's "Two and a Half Men" (7.4/12) and "Worst Week" (4.6/7) won the hour. The first part of ABC's broadcast of "Charlie and the Chocolate Factory" was second. There was a third place tie between NBC's "Momma's Boys" and FOX's fall finale of "Prison Break" with a 3.2/5, though FOX beat NBC in viewers and 18-49 rating for the hour. "One Tree Hill" was fifth on The CW.

"CSI: Miami" gave CBS a 10 p.m. win with a 5.8/10. The second hour of ABC's movie followed with a 3.9/6 (and beat the CBS procedural in the key demo). NBC's "Momma's Boys" was last on the hour.

All ratings information comes from preliminary Fast National data, which includes live and same-day DVR viewing. All numbers are subject to change.