The drama, which premiered to 3.93m last week, fell to 3.39m (14.7%) in the 9pm hour. A further 129k tuned in on timeshift.
Love Life was beaten by BBC One's John Bishop's Sport Relief Hell, which got 5.2m (22.5%) and was preceded by Watchdog (3.84m/16.4%).
BBC Two's Hairy Bikers' Bakeation grabbed 1.11m (5.2%) from 7pm. It was followed by Natural World (1.68m/7.2%) and White Heat (1.1m/4.7%).
On Channel 4, Get Your House in Order took 1.08m (4.6%) from 8pm (+1: 190k/0.8%), with Mary's Bottom Line managing 1.52m (6.6%) from 9pm (+1: 221k/1.3%).
Channel 5 showed a two-hour long Inside the Titanic, averaging 1.44m (6.2%) and 113k (0.6%) on timeshift.
Overall, BBC One won primetime with 22.9% ahead of ITV1's 20.9% (+1: 0.6%). BBC Two came third with 5.8% beating Channel 4's 4.8% (+1: 0.9%) and Channel 5's 4.7% (+1: 0.3%).
On the multichannels, ITV2's Celebrity Juice continued with 1.41m (7.9%) in the 10pm hour and 221k (2.2%) on +1. Sky1's Glee had 331k (1.4%) from 9pm, beaten by BBC Three's combination of Pramface (374k/1.6%) and White Van Man (360k/1.6%).
BARB ratings data supplied by Attentional