I Love My Country debuted with 2.96m viewers on Saturday (August 3), overnight data suggests.
BBC One's new patriotic celebrity quiz show attracted 17.1% of the available audience from 7.30pm.
Indiana Jones and the Last Crusade earlier grabbed 3.12m (22.4%) from 5.15pm. The National Lottery: In It to Win It scored 4.42m (23.5%) at 8.15pm, while Casualty was watched by 4.41m (22.6%) at 9.15pm and Mrs Brown's Boys pulled in 4.16m (23.6%) at 10pm.
Meanwhile, Your Face Sounds Familiar finished with 3.70m (21.5%) on ITV at 7.30pm, its highest ratings since its debut in June. All Star Family Fortunes earned 3.29m (17%) at 8.45pm and the latest episode of The Americans was seen by 950k (5.4%) an hour later.
Back on BBC Two, Dad's Army aired from 7pm, with 650k (4.2%) tuning in. Proms Extra 2013 had 550k (3.3%) at 7.30pm and David Starkey's Music and Monarchy took 740k (4.1%) at 8.15pm.
The fourth instalment of drama Top of the Lake attracted 890k viewers (4.6%) from 9.15pm, down slightly on last week. A Tribute to Mel Smith then interested 1.12m (6.7%) at 10.15pm.
Channel 4 showed Grand Designs to 770k (4.9%) at 7pm. The X-Men was seen by 1.21m (6.5%) at 8pm, after which 2010 movie Kick-Ass took 1.26m (9.5%) at 10pm.
Elsewhere, 882k (5.5%) caught the cricket between 7pm and 8pm on Channel 5, while a double bill of NCIS had 692k (3.9%) and 827k (4.3%) respectively from 8pm. The latest episode of Big Brother interested 1.09m (6.6%) at 10pm and Big Brother's Bit on the Psych grabbed 502k (4.7%) an hour later.
Foyle's War was the highest rated show on the multichannels, picking up 938k (5.6%) on ITV3 at 6.50pm.
