A peak of nearly 11.3m viewers saw Mo Farah celebrate his second gold medal of the London 2012 Olympics.
The long-distance runner lined-up in his less favoured event, the 5,000m, and again ripped the field apart in front a rapturous crowd at the Olympic Stadium.
It was not the race itself that delivered the high audience, but Farah’s victory celebrations, which drew a five-minute high of 10.95m (43.78%) to BBC1 at 7.55pm. A further 306k (1.41%) watched on BBC Olympics 1 at the same time.
It gave the lap of honour a combined peak audience of 11.25m (45.19%) – the biggest of the day, according to overnight Barb figures supplied by Attentional.
Later in the evening, the Jamaican 4x100 metre relay team clinched gold in record-breaking style, emphatically led home by Usain Bolt.
Their celebrations, which featured Bolt and training partner Yohan Blake pulling their famous poses, drew a high of 10.8m (43.43%) on BBC1 at 9.15pm, while another 281k (1.15%) watched on BBC1 Olympics 1.
Elsewhere, the biggest audience of the day was reserved for Tom Daley. His bronze in the 10 metre platform diving drew a five-minute peak of 7.66m (30.01%) on BBC1, 1.57m (6.16%) on BBC Olympics 2 and 6m (23.55%) on BBC3 at 9.50pm.
A further 551k (2.16%) watched on BBC HD, giving the coverage a total combined high of 15.9m (61.88%).
The 6.01m (23.55%) viewers on BBC3 alone was the channel’s biggest audience of the Games and its highest ratings on record, beating EastEnders live follow up episode, which pulled in 4.29m (15.88%) viewers on 19 February 2010.
Olympics 2012 (BBC1) 7.20pm-8.20pm
Overall, BBC1’s evening coverage dominated the evening schedule in familiar style, but did not matching last Saturday’s average of 12.21m (51.45%) when the likes of Jessica Ennis were competing.
Midsomer Murders (ITV1) 8pm-10pm
1.66m (7.03%) / 147k (0.64%) +1
ITV1 endured another torrid day, with a repeat from series 14 of Midsomer proving its biggest draw, despite it being nearly 400k viewers down on last week.
Big Brother (C5) 9pm-10pm
870k (3.7%) / 69k (0.36%)
The reality show was next in line, beating both BBC2 and Channel 4. It didn’t even secure Channel 5’s biggest audience of the day. That honour fell to CSI: Miami, which secured 940k (5%) viewers at 10pm.
FILM: The Curious Case of Benjamin Button (C4) 6.55pm-10pm
790k (3.6%) / 159k (0.7%) +1
The 2008 David Fincher film was C4’s best effort of the day.
BBC Proms 2012 (BBC2) 8pm-9.20pm
The proms were in last place in the battle for viewers in primetime.