The Philip Glenister drama was seen by 4.5 million (21.8%) at 9pm on BBC One. Later, Question Time appealed to 3.1m (26.7%) at 10.35pm, followed by the first part of Vote 2014 results with 1.0m (25.8%) at 11.35pm.
On BBC Two, the Chelsea Flower Show coverage continued with 2.4m (11.4%) at 8pm, followed by Horizon with 921k (4.4%) at 9pm.
ITV's broadcast of Harry Potter and the Deathly Hallows - Part 2 thrilled 2.7m (13.0%) at 7.30pm (496,000/2.6% on +1).
On Channel 4, Posh Pawn brought in 1.5m (7.1%) at 8pm (271k/1.3%), while Heston's Great British Food appealed to 913k (4.4%) at 9pm (119k/0.7%).
Channel 5's Trauma Doctors attracted 1.3m (6.1%) at 9pm, followed by Person of Interest with 698k (4.2%) at 10pm.
On BBC Three, Tyger Takes On interested 263k (1.3%) at 9pm, while Jonah from Tonga amused 223k (1.3%) at 10pm.
BBC Four's Ray Mears special How the Wild West Was Won intrigued 859k (4.1%) at 9pm.
On E4, The Big Bang Theory tickled 1.3m (6.2%) at 8pm (266k/1.3%), followed by How I Met Your Mother with 722k (3.4%) at 8.30pm (209k/1.0%) and Brooklyn Nine-Nine with 464k (2.2%) at 9pm (163k/0.9%).
ITV2's Fearne and... McBusted concluded with 415k (2.0%) at 9pm. while Celebrity Juice entertained 809k (5.0%).
On Sky1, the latest Arrow was seen by 312k (1.5%) at 8pm.