The BBC One dance competition peaked with 10.5 million viewers (a huge 45.3% share), while The X Factor trailed with a peak of 8.09 million (34.1%), with an extra 357K watching on ITV1 +1 (1.8%).
Strictly averaged 9.96m (43.7%) in the 6.30pm to 8.15pm slot, while The X Factor could only manage an average of 7.6m (32.3%) between 8.20pm and 10pm, adding 357k (1.8%) on ITV1+1. Meanwhile, The Xtra Factor was watched by 561.1k (3.1%) and 46.2k (0.4%) on ITV2+1.
The figures mark the fifth consecutive Saturday night that the ballroom dancing show has trounced ITV's singing competition in the ratings.
Back on BBC One, Merlin benefitted from its Strictly lead-in with 5.26m (22.1%), while teatime treat Pointless preceded the dance competition with a strong 4.65m (24.9%) between 5.30pm and 6.30pm.
Elsewhere, BBC Two's showing of Dad's Army amused 2.09m (8.8%) while Channel 4's Grand Designs could only mange 670k (2.8%) (+1: 162.8k/0.7%).
Overall, BBC One won primetime with 27.9% ahead of ITV1's 20.1% (+1: 1.1%). BBC Two claimed third place with 6.6%, above Channel 4 and Channel 5, which both had 3.5% (+1: 0.7% and 0.2% respectively).