The show, which stars Martin Clunes as the disgruntled doctor, pulled in a respectable 7.67m (30.4%) during the 9pm hour.
Earlier on ITV1, The X Factor logged 10.52m (41.4%) between 7.45pm and 9pm, improving slightly on the previous night's performance, which was affected by the clash with Strictly Come Dancing.
Over on BBC One, 5.37m (20.9%) tuned in for the new series of Antiques Roadshow during the 8pm hour, then Waking The Dead took 6.36m (25.2%) at 9pm.
The third episode of Last Chance To See had 1.98m (7.7%) for BBC Two at 8pm, then the audience dropped to 1.7m (6.7%) during the 9pm screening of Dragons' Den: On Tour.
Celebrity Come Dine With Me, which featured Dane Bowers, Bobby Davro, Dani Behr and EastEnders star Leila Morse, put in 1.7m (6.6%) for Channel 4 at 8pm. Later, at 9pm, 1.16 tuned in for Kevin McCloud's Grand Tour.
Five ran Vin Diesel action thriller The Fast And The Furious, which averaged 694k (2.7%) between 8pm and 10.10pm.
Overall, ITV1 dominated primetime with an average share of 30% to BBC One's 21.3%. BBC Two was third with 9.9%, followed by Channel 4's 5% (+1: 1%) and Five's 3.1%.
Elsewhere, The Xtra Factor put in 884k (3.8%) for ITV2 during the 9pm hour, beating Sky1's House, which interested 485k (2.1%) and the fifth episode of Harper's Island, which attracted 325k (1.4%) to BBC Three. The sixth episode, which aired straight after at 9.40pm, pulled in 358k (1.8%).
New ITV2 drama series Trinity, which stars Christian Cooke and Charles Dance, opened to 596k (3.8%) during the 10pm hour.
BARB ratings data supplied by Attentional