The series made a strong return Wednesday, November 4 but has since been affected by clashes with ITV1's Collision and I'm A Celebrity.... The fourth instalment of series eight, which aired last night in its usual 9pm slot, managed to improve by around 130k on last week's performance.
Earlier on BBC One, Waterloo Road put in 4.86m (20.2%) during the 8pm hour.
Over on BBC Two, Top Gear and Andrew Marr's The Making Of Modern Britain took 2.02m (8.9%) and 2.46m (10.4%) at 8pm and 9pm respectively.
The Family interested 1.88m (8%) for Channel 4 at 9pm, then the audience dropped to 1.05m (6.3%) during the 10pm screening of True Blood. Earlier, at 8pm, 2.24m (9.8%) watched Ten Years Younger: Bus Pass Challenge.
Five's Britain's Best Brain, fronted by Zoe Ball and Jamie Theakston, managed 530k (2.3%) at 8pm, then Will Smith movie Hitch put in 1.25m (6.5%) between 9pm and 11.30pm.
ITV1's coverage of Manchester United's game against Besiktas in the Champions League Live averaged 4.87m (21.5%) between 7.30pm and 10pm.
Overall, BBC One came top during primetime with an average share of 22.4% to ITV1's 20.1%. Channel 4 was third with 7.1% (+1: 0.7%), followed by BBC Two with 7.7% and Five's 4.1%.
Elsewhere, Sky1's screening of the latest NCIS: Los Angeles episode put in 409k (1.9%) at 9pm, and Gossip Girl attracted 200k (0.9%) to ITV2 in the 8pm hour.
BARB ratings data supplied by Attentional