Hosted by Davina McCall, the big-money gameshow logged 1.88m (8.6%) between 9pm and 10.30pm, adding 183k on Channel 4 +1. However week-on-week, the programme lost 300k.
BBC One recaptured its 9pm stronghold after Have I Got News For You and a repeat of Outnumbered amused 4.55m (20.2%) and 3.35m (15.3%), almost level on last week, while Paul O'Grady Live fell just over 200k to 3.42m (14.7%). However, the chatshow added 133k on ITV1 +1.
Despite the victory, the comedy duo could have been stronger if for a stronger lead-in at 8.30pm - A Question of Sport could only score 2.56m (11.3%) against a highly-rated episode of Coronation Street on the other side.
Over on BBC Two, 2m (9%) watched more coverage of the Chelsea Flower Show between 8pm and 9.30pm, then Paul Merton's Birth of Hollywood kicked off with 1.8m (8.6%).
Eddie Stobart: Trucks and Trailers continued with a healthy 1.35m (6.1%) on Channel 5 at 8pm, after which The Mentalist notched up 1.61m (7.2%) in the 9pm hour.
Overall, ITV1 triumphed in primetime with 21.6% (+1: 0.5%), ahead of BBC One's 19.3%, BBC Two's 7.5%, Channel 4's 5.6% (+1: 0.6%), and Channel 5's 5.5%.
Elsewhere, the season finale of American Idol managed 608k (3%) between 9pm and 11pm for ITV2.
BARB ratings data supplied by Attentional