An average of 9.92 million viewers (42.8%) tuned in to see the five remaining couples perform two dances for a spot in next week's final.
It was immediately followed by Atlantis, which drew 4.2m viewers (17.8%) at 8.20pm. Approximately 3.69m (15.8%) stuck around to watch Casualty at 9.05pm, while 3.51m (2.7%) viewers tuned in to watch highlights from Arsenal vs. Manchester City on Match of the Day.
The first of a two-part X Factor final was ITV's highest-rated show on Saturday night. An average of 8.24m (34.9%) viewers watched the final three contestants battle it out for the grand prize.
Also on ITV, The Chase: Celebrity Special attracted an audience of 3.3m (14.3%) at 7pm, while 3.7m (20.2%) watched Will Ferrell on The Jonathan Ross Show at 10.05pm.
Over on BBC Two, Tron Legacy reeled in 910k (3.9%) viewers at 8pm, while 670k (3.4%) watched