The coverage from London garnered an 18-49 demo rating of 9.2 and 28.75 million viewers on average between 8-11pm.
The figures are 5% down from last Wednesday, but are higher than the equivalent night from Beijing in 2008.
The preview episode of Matthew Perry's new sitcom Go On attracted high ratings post-Olympics at 11pm.
It brought in a demo rating of 5.6 and 16.1 million viewers. However, as it was aired commercial-free and was a preview episode, it will not be included in Nielsen's official national reports, or in the averages for the week, month or season.
CBS's Big Brother fell10% from last week to match its series low of 1.8 (5.31m) at 8pm.
ABC's Final Witness climbed 14% from last week to a rating of 0.8 (2.79m) at 10pm.
The highest rating among the rest of the night's repeats went to ABC's Modern Family (1.1/2.9m).