The new show, presented by David Mitchell, Jimmy Carr, Lauren Laverne and Charlie Brooker, averaged 1.41m (7.9%) for Channel 4 from 10pm and 138k (1.4%) on timeshift.
Human Planet, a documentary series narrated by actor John Hurt, pulled in 4.82m (19.8%) on BBC One in the 8pm hour, down 830k on last week's episode.
Hostage negotiation drama Kidnap and Ransom continued with 4.68m (18.9%) on ITV1 in the 9pm hour, down 970k week-on-week. Also in the 9pm hour, BBC One's comedy double of Come Fly With Me and Not Going Out amused 5.78m (23.8%) and 4.04m (17.4%) respectively.
Earlier, The One Show grabbed 5.07m (23.1%) on BBC One from 7pm, while Tonight: Daylight Robbery had 3.74m (16.3%) on ITV1. Later, Question Time brought in 2.65m (21.3%) on BBC One from 10.45pm.
Channel 4's Relocation, Relocation brought in 1.71m (7%) in the 8pm hour and 350k (1.5%) on timeshift. New series Rome Wasn't Built In a Day mustered 1.64m (6.9%) from 9pm and 224k (1.2%) on +1.
Over at BBC Two, Who Does What fetched 960k (4.3%) in the 7pm hour, before Michel Roux's Service served up 1.25m (5.2%) from 8pm. Men Of Rock captivated 1.21m (5.1%) in the 9pm hour, and The Great Outdoors had 810k (4%) from 10pm.
Channel 5's How Do They Do It? grabbed 747k (3.3%) from 7.30pm, before Secrets of the Blitz: Revealed had 1.04m (4.3%). Jack The Ripper: The Definitive Story appealed to 1.3m (5.5%) in the 9pm hour and a screening of From Hell brought in 859k (6.6%) from 10pm.
ITV1 narrowly won primetime with 23.9% against BBC One's 23.6%. Channel 4 came in third with 6.4% (+1: 0.8%), followed by BBC Two with 4.6% and Channel 5 with 4.4%.
Elsewhere, How Drugs Work: Cocaine educated 645k (2.7%) on BBC Three from 9pm, while The Big Bang Theory amused 636k (2.6%) on E4.
BARB ratings data supplied by Attentional