The 60-minute comedy pilot, which was created by the writer of Cold Feet and Life Begins, averaged 3.33m (15.3%) for BBC One from 9pm.
However, the programme was beaten in the 9pm hour by an episode of Midsomer Murders, which took 3.71m (17.4%) for ITV1 between 8pm and 10pm.
Earlier on BBC One, Question Of Sport pulled in 3.32m (18.6%) between 7pm and 7.30pm, before Rogue Traders grabbed 3.18m (16.7%).
The latest episode of Big Brother averaged 2.48m (11.4%) for Channel 4 from 9pm, up 240k on last night's broadcast. The programme also pulled in a further 423k (2.4%) on timeshift.
Also on Channel 4, The Untold Great Fire Of London brought in 1.29m (6.2%) from 8pm and 233k (1.1%) on timeshift. After Big Brother, Desperate Housewives took 1.28m (7.2%) in the 10pm hour, with 223k (2.3%) tuning in on Channel 4 +1.
Today At Wimbledon averaged 1.7m (8.1%) for BBC Two in the 8pm hour. It was followed by a repeat of Top Gear, which was watched by 2.26m (10.4%).
Comedy panel show Mock The Week secured 1.67m (8.7%) for BBC Two between 10pm and 10.30pm.
Documentary The Titanic Conspiracy: The True Story appealed to 743k (3.6%) for Five in the 8pm hour, and NCIS secured 1.53m (7%) between 9pm and 10pm.
New crime series K-Ville averaged 412k (4.2%) for Five in the 10pm hour, down 294k week-on-week.
Overall, BBC One gained victory in primetime with 21.7% against ITV1's 19.6%. BBC Two came in third with 8.3%, followed by Channel 4 with 7.4% (+1: 1.1%) and Five with 4.5%.
Elsewhere, a repeat of EastEnders pulled in 930k (4.3%) on BBC Three from 10pm, which was the largest multichannel audience of the evening.
BARB ratings data supplied by Attentional