Lord Alan Sugar's dismissal of Stuart Baggs, Joanna Riley and Jamie Lester was seen by 7.91m (30.3%) on BBC One from 9pm, up 770k week-on-week.
Spinoff show The Apprentice: You're Fired! had 3.9m (17.9%) on BBC Two from 10pm, up 610k on last week's episode.
Earlier on BBC One, The One Show grabbed 4.65m (21.4%) from 7.30pm, before DIG 1940 opened with 4.61m (21.3%). Jimmy's Food Factory and Nigel Slater's Simple Suppers cooked up respective audiences of 3.65m (15.9%) and 3.55m (14.6%) from 8pm. Film 2010 with Claudia Winkleman entertained 1.5m (11.5%) from 10.45pm.
On ITV1, The Lakes pulled in 3.49m (16.1%) from 7.30pm, before A Touch Of Frost took 3.35m (13.4%) between 8pm and 10pm.
Channel 4's The Million Pound Drop Live returned in the earlier timeslot of the 8pm hour, attracting 2.13m (9%) and 150k (0.6%) an hour later. Grand Designs brought in 1.69m (6.5%) from 9pm and 165k (0.9%) on timeshift, before Hollyoaks entertained 740k (4.1%) and 179k (1.9%) on +1.
Escape To The Country mustered 1.86m (8.6%) on BBC Two from 7pm, before Edwardian Farm captivated 2.66m (11.3%) from 8pm. Ancient Worlds educated 1.33m (5.1%) in the 9pm hour.
Live coverage of Liverpool's goalless draw with FC Utrecht in the Europa League averaged 2.55m (10.5%) for Channel 5 between 7.30pm and 10.15pm.
Overall, BBC One won primetime with 22% against ITV1's 16.1%. BBC Two came in third with 9.4%, followed by Channel 5 with 8.3% and Channel 4 with 6.1% (+1: 0.7%).
Elsewhere, the biggest multichannel audience of the night went to a screening of Catch Me If You Can, which had 802k (3.3%) on BBC Three from 8pm.
BARB ratings data supplied by Attentional