The Wrong Mans kept above 2 million viewers for its second episode on Tuesday, according to overnight data.
James Corden and Mathew Baynton's comedy dropped over 900,000 viewers to 2.12m (9.0%) at 10pm. Sarah Millican's Television Programme dipped to 1.57m (7.1%) at 9.30pm.
Earlier, The Great British Bake Off jumped by nearly 500k to 6.26m (25.9%) for its latest episode at 8pm.
BBC One's New Tricks topped the ratings overall outside of soaps with 6.77m (29.6%) at 9pm.
On ITV, Celtic's loss against Barcelona scored 3.08m (12.3%) at 7.30pm.
Channel 4's Double Your House for Half the Money attracted 993k (4.1%) at 8pm (226k/1.0% on +1). My Big Fat Gypsy Christening entertained 1.85m (4.2%) at 9pm (355k/2.3%).
On Channel 5, CSI: NY thrilled 957k (4.2%) at 9pm (239k/1.5%), followed by Castle with 665k (4.2%) at 10pm (122k/1.5%).
BBC Three's Don't Tell the Bride continued with 566k (2.5%) at 9pm, while Bad Education tickled 894k (5.3%) at 10pm.
