The BBC One dance competition had a 44.4% audience share from 6.30pm, holding steady on its win over The X Factor last week.
X Factor's audience was up slightly to 7.73 (33.7%) from 8pm, with a further 284,000 (1.4%) tuning in on ITV +1.
Back on BBC One, Atlantis, which was just renewed for a second series, pulled in 4.39m (19%), while Casualty had 3.8 million (16.9%).
The Jonathan Ross Show attracted 3.16m viewers (17.2%) following The X Factor on ITV, while The Chase Celebrity Special brought in 3.01m (13.6%) earlier in the night at 7pm.
It was a quiet evening for Channel 4, with a showing of Die Hard 2 bringing in its best ratings of the night with 1m (5%) from 9pm. Channel 5 had 422,000 (2.4%) for Stephen King's Bag of Bones in the same timeslot.
Over on ITV2, The Xtra Factor appealed to 256,000 after Miss Dynamix lost out in the Flash Vote on the main show.