As the mystery surrounding Brody began to unravel in 'Crossfire', episode nine of 12, 2.15m (8.5%) watched on Channel 4 at 9pm, with a further 421k (2.3%) on +1.
Increasing over 400k week-on-week, the US show edged its previous best in March and is cementing itself as one of Channel 4's best-rated imports in recent years.
Silent Witness led the hour with 6.51m (25.8%), beating the final part of ITV1's Titanic. Julian Fellowes's lavish mini-series, which has underperformed for the network, won back a small portion of its audience with 3.52m (13.9%) and 225k (1.2%).
Only 1.46m (8.1%) stayed with ITV for one-off documentary Words of the Titanic at 10pm (+1: 101k/1.1%), while BBC News (5.15m/24.3%) and Have I Got a Bit More News For You (2.49m/15.7%) dominated proceedings for BBC One.
The Antiques Roadshow brought in a bumper audience of 7.19m (29%) at 8pm, prior to which Countryfile interested 5.76m (24.5%). Titanic with Len Goodman concluded at 6.05pm with 2.2m (11.2%).
The Big Quiz between the casts of Benidorm and The Only Way Is Essex followed with 2.37m (9.7%) and 187k (0.9%) on timeshift.
Movie Marley and Me, screened in the early evening by Channel 4, appealed to 1.49m (6.3%) and 255k (1%) on +1 - putting it ahead of Practical Magic (969k/4.5%) on Channel 5.
US fantasy show Once Upon a Time anchored Channel 5's schedule with 1.7m (6.9%) in the 8pm hour, while a Top Gear repeat on BBC Two had 1.6m (6.5%).
A This World special on last year's Norway massacre attracted 1.06m (4.2%) on Two at 9pm, then Match of the Day 2 netted 1.79m (9.4%) in its usual slot.
BBC One achieved an easy victory in primetime with 25.1%, ahead of ITV1's 16.5% (+1: 0.5%). Channel 4 claimed third place with 6.6% (+1: 1.1%), beating BBC Two (5.1%) and Channel 5, which averaged 4.8% (+1: 0.2%).
> Click here to read today's multichannel TV ratings for last night
BARB ratings data supplied by Attentional