BBC One's screening of the programme was seen by 7.27m (33.8%) in the 8pm hour, beating the second half of Coronation Street on ITV1.
Elizabeth: Queen, Wife, Mother - ITV's own royal offering - took 4.86m (22.6%) in the 9pm hour. The documentary added 272k on ITV1 +1.
Have I Got News For You (4.22m/19.7%) and The Graham Norton Show (3.13m/22.6%) aired at 9.30pm and 10.35pm to relatively impressive figures, while ITV1's Poms and Paradise interested 2.99m (14.5%) at 8pm (+1: 146k).
BBC Two's Great British Menu served up 1.68m (8.2%) from 8pm, then Gardeners' World enthralled 1.2m (5.3%) at 8.30pm. The Great British Story: A People's History grabbed 1.24m (5.7%) in the 9pm junction, before 767k (4.8%) tuned in for Episodes an hour later.
Channel 4's 8 Out of 10 Cats entertained 976k (4.4%) at 9pm (+1: 364k), after which Very Important People amused 664k (3.1%) at 9.30pm (+1: 137k). At 10pm, Alan Carr: Chatty Man attracted 1.41m (8%) and 275k on timeshift.
The Mentalist anchored Channel 5's schedule with 1.3m (6%) at 9pm, while Castle had 841k (4.7%) at 10pm.
Overall, BBC One led primetime with 24.5%, beating ITV1's 22.8% (+1: 0.9%). BBC Two claimed third place with 5.2%, ahead of Channel 4's 4.8% (+1: 0.8%), and Channel 5's 3.5% (+1: 0.1%).
Russell Howard's Good News Extra delivered 685k (4.5%) to BBC Three at 10.30pm.
BARB ratings data supplied by Attentional