Celebrity Big Brother was followed by Kate Thornton - Anorexic: My Secret Past at 10pm, which averaged 616k (3.4%).
Cowboy Builders and Benidorm ER aired earlier with 814k (3.9%) and 1.13m (4.9%) respectively.
Elsewhere, BBC One aired Rip Off Britain (4.69m/22.4%), DIY SOS: The Big Build (5.19m/22.3%) and MasterChef (4.25m/17.6%).
ITV1's primetime coverage mostly consisted of an FA Cup football match, which averaged 3.4m (14.7%). Piers Morgan's Life Stories aired to an audience of 986k (9%) from 10.45pm.
BBC Two's Stargazing Live continued with 2.73m (11.7%), while Back to Earth took 2.42m (10%) and The Crusades followed with 1.77m (7.9%). Hairy Bikers' Best of British drew 2m (9.5%) from 7pm earlier that night.
On Channel 4, How to Cook with Heston served 1.09m (4.8%) from 8pm (+1: 117k/0.5%), The Fabulous Baker Brothers took 1.02m (4.3%) from 8.30pm (+1: 130k/0.5%), One Born Every Minute had 2.83m (11.7%) in the 9pm hour (+1: 467k/2.6%) and Talhotblond averaged 1m (5.8%) afterwards (+1: 181k/2%).
Overall, BBC One came out on top with 20.1%, ahead of ITV1's 15.4 (+1: 0.4%). BBC Two followed with 9.4%, with Channel 4 grabbing 6.6% and Channel 5 ending up with 5.2%.
On the multinationals, the live feed of Celebrity Big Brother on 5* was watched by an impressive 917k (5%).
BARB ratings data supplied by Attentional