The medical documentary series gave Channel 4 a rare victory in the weeknight hour, pulling in 2.89m (13.3%) as well as 401k (2.6%) on +1 - rising nearly 600k week-on-week.
A and E edged BBC One's Olympics documentary Victoria Pendleton: Cycling's Golden Girl (2.79m/12.8%) and ITV1's flop reality show Superstar (2.69m/12.7%).
DIY SOS: The Big Build led the 8pm hour with 4.3m (21.1%), overcoming Britain's Secret Treasures on 3.28m (16.1%) for ITV1 (+1:182k/0.8%). Channel 4 mustered 1.14m (5.6%) and 186k (0.9%) on +1 for Supersize v Superskinny.
Over on BBC Two, Restoration Home (1.66m/8.1%) and The Story of Operation Mincemeat (1.15m/5.3%) aired, while 1.78m (8.2%) tuned in for NCIS (+1: 119k/0.6%) and Big Brother logged 1.22m (6.6%).
Overall, ITV1 led primetime with 18.6% (+1: 0.6%), beating BBC One's 16.9%. Channel 4 earned third place with 6.6% (+1: 1.1%), ahead of BBC Two's 5.4%, and Channel 5's 5.1% (+1: 0.2%).
Olympics' Most Amazing Moments, hosted by Richard Bacon, attracted 1.21m (8.5%) to BBC Three from 10pm and was the most-watched multichannel broadcast of the day.
Meanwhile, Lewis continued to top the million mark for ITV3 by drawing 1.05m (5.2%) from 8pm and ITV4's Tour De France highlights averaged an impressive 860k (4.3%) from 7pm.
BARB ratings data supplied by Attentional