The BBC One dance competition continued its successful 11th series with 10m viewers and a 44% audience share, peaking at 11.1m.
The X Factor was in second place again, with 7.65m (33.2%) tuning in from 8pm. A further 231,000 (1.1%) caught the singing competition on ITV +1.
Back on BBC One, Atlantis attracted 4.46m (19.2%) from 8.15pm, while Casualty followed with 4.18m (19.1%).
A Dad's Army repeat on BBC Two had 1.35m (5.8%) at 8.30pm, followed by Live from the National Theatre: 50 Years on Stage with 947,000 viewers (5%).
Fool Britannia had 2.11m (8.8%) from 6.30pm, followed by The Chase: Celebrity Special at 7pm with 3.5m (13.3%). The Jonathan Ross Show attracted 3.19m (17%) at 9.50pm.
On Channel 4, the network premiere of The Eagle appealed to 1.41m viewers (7.1%), with the Grand Designs repeat that preceded it securing an audience of 830,000 (3.5%).
On Channel 5, 2002 movie Collateral Damage had 444,000 (2.3%) from 9pm, followed by Alien Hunter at 11.15pm with 419,000 (4.9%).
The Xtra Factor audience grew to 421,000 (2.2%), while a Family Guy marathon performed strongly for BBC Three, pulling in a peak of 691,000 (9.1%) at 12am.
BARB ratings data supplied by Attentional