Ratings Chart Attack!

The Olympics roll on for NBC, as the five-day average stands 13% above the 2004 Athens Games in the ratings.

Racking up a 11.1 rating/30 share in the 18- to 49-year-old demographic, according to preliminary Nielsen numbers, the Beijing Olympics are outpacing the Athens Games in both demos and total viewers (by 21%).

Day five of the Games was up 6% over the Athens Games, but it’s down 3% compared with Sydney in 2000. However, due to the nature of fast nationals, that number could change.

NBC finished the night in first with an 11.1/30.

Despite the massive Olympics numbers, second-place CBS aired “Big Brother” (2.4/6) to little erosion week-to-week. In fact, with 6.51 million total viewers, “Brother” hit a season high for a Tuesday episode.

CBS ended Tuesday night with a 1.6/4.

Third-place ABC, with a 1.5/4, launched the time-period premiere of “Wanna Bet?” (1.4/4), which increased 27% versus its previous time-period average on Mondays. “Primetime: Medical Mysteries” also pulled in a 1.4/4.

Fox placed fourth with a 1.2/3 and The CW was fifth with a 0.4/1.