An audience share of 16.85% watched Diversity star Perri Kiely win the second series of the ITV diving show in its 7.20pm time slot. Viewing figures were down by more than 1.5m compared to the series one final - which was the most-watched show of the night when it aired last year.
Despite a dip of 780,000 from last week's show, The Voice UK continued to top Saturday night ratings with 7.66m (33.7%) at 7.10pm on BBC One.
National Lottery: Who Dares Wins followed at 8.30pm with 5.49m (25.4%), while medical drama Casualty pulled in 5.11m (24.4%) at 9.20pm.
BBC Two's Sochi 2014 coverage interested 2.12m (9.44%) when Winter Olympics: Today at the Games aired at 7pm. 1.3m (5.81%) tuned in to Top Gear at 8pm, while the Coen Brothers remake of True Grit entertained 1.76m (8.69%) at 9pm.
Back on ITV, dating show Take Me Out attracted 3.24m (15.06%) at 8.50pm and this week's instalment of The Jonathan Ross Show - featuring interviews with Uma Thurman, Andrew Marr, James Corden and Abbey Clancy - was seen by 2.44m (13.23%).
Channel 4's Walking Through History was the channel's highest-rated show of the night, with 1.33m (5.96%) tuning in to the Tony Robinson series at 8pm. Meanwhile, US drama Hostages continued to lose viewers, dropping 90k from last week with 590k (2.76%) at 9pm.
Channel 5's triple-bill of NCIS ran from 6.50pm - 10.10pm, with the final episode of the evening pulling in the most viewers with 846k (3.97%) at 8.30pm. Earlier instalments attracted 722k (3.25%) and 732k (3.2%) at 6.50pm and 7.35pm respectively.
Over on the multichannels, ITV3 had a successful evening with Doc Martin attracting 780k (3.49) at 8pm, followed by Vera at 9pm - which topped the multichannel ratings with 841k (4.22%).
BBC Four's Salamander continued with 801k (3.76%) at 9pm, with 689k (3.48%) tuning in for the drama's fourth episode at 9.50pm.
BARB ratings data supplied by Attentional