Whatever Happened To Harry Hill?, a mockumentary reliving the comic's cult Channel 4 sketch show with Al Murray and Burt Kwouk, attracted just 817k (3.9%) in the 9pm hour.
Fellow performer Peter Kay delivered 3.6m in the same slot last week, almost five times Hill's audience.
Vic Reeves and Bob Mortimer's new spoof quiz show, Vic & Bob's Lucky Sexy Winners, followed with 574k (3.1%) at 10pm - the Funny Fortnight season lineup denting the broadcaster's share for the night.
Liverpool's trip to Hearts in the Europa League gave ITV4 an impressive average audience of 1.38m (6.6%) between 7pm and 10pm, helping the sports channel trump Channel 4.
For some of the 9pm hour, ITV4 was even rating higher than its terrestrial big brother ITV1, which had just 1.51m (7.2%) for the concluding part of Jennifer Saunders factual vehicle Back in the Saddle.
The Hairy Dieters maintained a large 2.86m (12.9%) over on BBC Two at 8pm, after which 1.75m (8.3%) watched a special Springwatch.
Crimewatch on BBC One won the 9pm slot with just 2.75m (13%).
Meanwhile, The Hotel Inspector soared to 1.86m (6.8%) on Channel 5, then 10pm's Celebrity Big Brother managed a strong 2.03m (11.8%) - posting an impressive 400k week-on-week rise. Emma Willis's Bit on the Side interested 792k (8.5%) an hour after that.
Overall, BBC One led primetime with 18.8%, overpowering ITV1 which had 15.8% (+1: 0.7%). BBC Two earned third place with 8.2%, while Channel 5 rose to fourth with 6%.
Boosted by the football, ITV4 made fifth spot with 5.5%, comfortably above Channel 4's 3.3% (+1: 0.7%) which finished in seventh, behind ITV3 (3.7%) which aired Lewis (1m/5.2%) between 8pm and 10pm.
BARB ratings data supplied by Attentional