Celia Imrie's family history, the eighth edition of the genealogy show's ninth series, drew 4.32 million and an audience share of 19.1% in the 9pm hour.
The BBC One hit was pipped by the return of ITV1's DCI Banks, which pulled in 4.42m (19.5%) - it is the second week ITV has won the 9pm slot after Who Do You Think You Are? made way for a Panorama programme last week.
Starring Stephen Tompkinson, the crime drama's second series launch matched last year's Friday opener, and added 263k (1.6%) on ITV1 +1.
Grand Designs, which also didn't air last week due to Channel 4's week-long spread of Hotel GB, held 2.15m (9.5%) as well as an impressive 464k (2.8%) on +1, while Dallas's decline deepened with 1.2m (5.3%) watching the latest episode on Channel 5 (+1: 149k/0.9%), and 1.86m (8.2%) stayed tuned to BBC Two's Welcome to India.
Overall, ITV1 claimed another Wednesday primetime win with 22.1% (+1: 0.9%), trumping BBC One's 20.5%. Channel 4 edged BBC Two to third place with 5.8% (+1: 1%) versus 5.7%, leaving Channel 5 in last place among the terrestrials with 4% (+1: 0.4%).
The Only Way Is Essex topped the multichannel ratings with 807k (4.6%) in its traditional 10pm slot on ITV2, adding a further 111k (1.3%) an hour later on timeshift.
BARB ratings data supplied by Attentional