On the eve of the Emmy nominations and with the ESPYS over on ESPN, it was relatively quiet on the Big 4 on Wednesday. On ESPN, the Jon Hamm-hosted sports award show was up 19% over last year with a 1.9 overnight rating. With a repeat of the Gordon Ramsay-led reality show kicking off Fox’s night, a one-hour MasterChef (2.1/7) at 9 PM was the network’s sole offering last night. A Mystery Box Challenge win by former NFL player Eddie Jackson shook things up as the show slimmed things down to eight remaining contestants. Tied with Big Brother for being second highest rated show of the night, MasterChef dipped 9% on Wednesday from its July 10 show but stayed steady in viewership with 5.55 million watching.

CBS’s only original of the night was Big Brother (2.1/8). The reality series was also up a 5% notch from last week among adults 18-49 and saw a 6% rise is viewers to 6.31 million. ABC was all encores except for a new Nightline: The Lookout (0.8/2) that was up a tenth form the low it hit last week.

NBC, on the other hand, had an almost full primetime slate. There was a double shot of America’s Got Talent last night. At 8 PM (1.8/7) the network ran a recap show of the season so far which was up 38% over last week’s encore show. Then at 9 PM (2.8/9) it was one last round in Vegas before the show and the remaining contestants head off to NYC’s Radio City Music Hall. The highest rated and most watched show of the night with 11.02 million viewers, the 9 PM AGT was even with the final numbers for its July 10 show. AGT was followed by freshman Camp (1.4/4). In its second week, the Australian dramedy import slipped 7% from its premiere. NBC won the night in the key demo and in terms of total viewers with 7.731 million watching. 

Deadline's Dominic Patten - tip him here.