Lynda La Plante's latest crime drama, stripped across three nights this week, pulled in 5.33m (22.5%) for the 9pm hour while Spooks had 4.99m (21.1%).
Elsewhere at 9pm, a Time Team special looking into a lost World War One bunker achieved an impressive 2.63m (11.8%) in the 95 minutes to 10.35pm, and BBC Two's new drama documentary series Behind Closed Doors averaged 1.55m (6.5%) for the hour.
ITV1's most-watched programme of the night was the 7.30pm episode of Corrie, which averaged 9.53m (41.5%), down slightly week-on-week, while Emmerdale also saw a slight down-tick, averaging 7.01m (32.8%) at 7pm.
Hollyoaks garnered 2.09m (9.8%) for Channel 4 at 6.30pm (+1: 130,900, 0.6%), with E4's first-look at the next episode being watched by 791,700 (4.3%) from 7pm (+1: 73,500, 0.3%) - the top programme in multichannel for the night.
ITV1 comfortably won primetime with an average share of 25.1% (last week: 25.3%) to BBC One's 23% (22.4%). Channel 4 took third with 8.1% (6.1%), BBC Two fourth with 7% (9.4%) while Five rounded out the terrestrial pack with 3.3% (3.6%).
In multichannel homes, BBC Three's 10pm re-run of EastEnders proved popular with 710,900 viewers (4%), with 691,500 (6.1%) tuning in for first-look Spooks at 10.30pm.
ITV2's Hell's Kitchen USA pulled in a solid 625,500 (3%) at 9pm (+1: 164,500, 1.1%), increasing to 685,900 (4.4%) an hour later (+1: 153,400, 2%). ITV3 movie Brides in the Bath averaged 381,200 (3.5%) from 10pm while ITV4's Sanctuary dipped week-on-week to 358,900 (1.7%).
Ratings data supplied by Attentional