The Field of Blood ended with 2.43m on Friday (August 9), according to overnight figures.
The Glasgow-set newspaper drama, starring David Morrissey and Katherine Kelly, was down 930k on Thursday's opening episode.
Meanwhile, Hazel O'Sullivan's eviction on Big Brother was watched by 1.57m (8%) on Channel 5, while a further 153k (1.1%) caught the show on +1. Big Brother's Bit on the Side followed with 861k (6.9%) at 10.30pm.
Back on BBC One, The One Show interested 2.97m (17.3%) from 7pm, after which Nigel Slater's Dish of the Day appealed to 2.17m (11.6%) at 7.30pm. The latest episode of Celebrity MasterChef attracted 2.73m (12.9%) an hour later.
BBC Two showed A Summer in Wales to 990k (5.5%) at 7pm. It was followed by Mastermind with 1.51m (7.8%) at 8pm and Gardeners' World on 1.87m (8.9%) at 8.30pm. Natural World Sri Lanka and The Trip then grabbed 2.01m (10%) and 690k (3.8%) respectively from 9pm.
On ITV, River Monsters was seen by 2.47m (12.8%) at 8pm, while Doc Martin scored 2.62m (13%) at 9pm.
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Channel 4's Four Rooms secured 830k (4.1%) at 8pm, followed by 8 Out of 10 Cats Does Countdown with 1.64m (8.1%) at 9pm. Sarah Millican: Chatterbox Live had 1.12m (7%) at 10pm.
On Channel 5, coverage of The Ashes earned 758k (4.2%) at 7pm and World's Busiest Train Station took 1.06m (5.2%) at 8pm.
Movie Rush Hour 3 was the most watched broadcast on the multichannels, scoring 543k (2.9%) on Film4 from 9pm.
