NBC’s prime-time Olympics coverage saw its numbers decline significantly Monday night, based on Nielsen overnights. TVbytheNumbers.com reports that the three hours of prime time averaged an 8.1 rating in the key 18-49 demo for Monday’s 10th night of the London Games, down 24% from a week earlier and down 2% from the equivalent night of the Beijing Olympics four years ago.

The numbers had been running well ahead of Beijing until Monday.

Even so, NBC was the only broadcast network to attract much of an audience Monday night. Fox and CBS put up all repeats, while ABC made a go of it with a two-hour “Bachelor Pad” followed by the summer reality dud “The Glass House.” Both shows had series lows — “Bachelor Pad’s” 1.0 average in 18-49 was down 9% from a week ago, while “Glass” matched last week’s series low with a 0.6 average.

For prime time overall, NBC’s 8.1 average in viewers 18-49 easily led the pack, with the scraps picked up by Univision (1.5 average), Fox (1.1), CBS (1.0) and ABC (0.9). In total viewers it was NBC well out front with 26.0 million, followed by Univision with 3.8 million, CBS with 3.6 million, ABC with 2.8 million and Fox with 2.7 million.