Jamie's Ministry Of Food, following the chef's attempts to foment healthier eating in Rotherham, dropped to 2.52m (11.3%) in the 9pm hour. While still respectable, the ratings were lower than that of Five's US import CSI: Miami, which had 2.65m (11.9%) over the same period, and were down more than 600,000 on last week.
BBC One won the slot with 3.9m (17.5%) for the second episode of drama Sunshine, while ITV1 averaged 3.52m (15.8%) for Cops With Cameras. As usual, BBC Two was a distant last place in the slot with just 1.09m (4.9%) for fashion show British Style Genius.
Five stayed ahead of Channel 4 at 10pm, with 1.97m (11.7%) watching CSI: New York and 1.47m (8.9%) opting for Dawn Porter: Geisha Girl.
An hour-long Emmerdale was the most-watched show of the day, with 6.61m (31.2%) for ITV1 at 7pm. EastEnders, which began at 7.30pm, improved to 6.44m (29.2%) and picked up a further 964,000 (5.8%) on BBC Three.
Holby City drew 5.8m (25.9%) to help BBC One win the 8pm hour, although ITV1's Who Wants To Be A Millionaire? managed a decent 4.29m (19.1%) at the same time. Twiggy's Frock Exchange racked up 1.32m (5.9%) for BBC Two, down half a million on last week's opener.
Channel 4 and Five tied for the hour with 1.69m (7.5%) apiece for The Sex Education Show and new documentary series Nature Shock.
Overall during primetime, BBC Two managed a share of just 5.3% (last week: 6.7%). BBC One was first with 22.4% (19.7%), followed by ITV1 on 19.8% (20.7%). Five snatched third place with 8.3% (7.7%) and Channel 4 had 8% (9.8%).
Dave had a strong night in multichannel homes, meanwhile. Have I Got News For You brought in 401,000 (2%) at 9pm, then Jack Dee Live At The Apollo notched up the channel's all-day high of 468,000 (2.7%). QI followed an hour later with 441,000 (4.2%).
Other ratings successes included Living's Ghost Whisperer, with 432,000 (2.2%) in the 9pm hour; BBC Three's movie Shanghai Knights, with 505,000 (2.6%) from 7.10pm; and the subsequent premiere of Last Man Standing, with 424,000 (2.2%) in the 9pm hour.
Ratings data supplied by Attentional