An audience of 5.34 million (21.7%) tuned in at 9pm to see the ex-EastEnders actress's latest project.
Earlier in the evening, Countryfile pulled in 6.37 million (24.3%) at 7pm, while Antiques Roadshow had 5.12 million (19.5%) at 8pm.
However, ITV's latest episode of Foyle's War beat them all with an audience of 6.71 million (26.3%) watching at 8pm. Later, Perspectives had an audience of 2.66 million (13.2%) at 10pm.
On Channel 4, the movie Red brought in 2.59 million (11.5%) at 9pm, while Channel 5 had success with the Sandra Bullock classic Miss Congeniality, which amused 1.48 million (5.7%) at 9pm.
US import Person of Interest intrigued 715k (3.5%) at 10pm on Channel 5.
BBC Two sketch show It's Kevin had an audience of 411k (2.3%) at 10.30pm.
BBC Three's zombie series In The Flesh has failed to secure the ratings of the channel's former hit Being Human, only attracting 392k (1.98%) at 10pm.
Elsewhere, Ashley Banjo's Secret Street Dance Crew had 505k (1.93 million) at 7pm on Sky1.
BARB ratings data supplied by Attentional