'Lewis', starring Kevin Whately and Laurence Fox, won the primetime slot with a 24.5% share of the 8-10pm audience.
BBC One's 'The No 1 Ladies' Detective Agency', which this week saw Precious Ramotswe helping a wealthy American to find out why her son went missing from a commune, came in second with 3.4m viewers and a 13.2% share of the 9-10pm audience.
'The Secret Millionaire', featuring Gary Eastwood who made his millions through scrap metal but has never got over the death of his two younger sisters from heroin, drew 3.3m viewers and a 12.5% share of the audience to Channel 4. Including Channel 4+1 figures it reached 3.5m viewers.
The final part of BBC Two's 'Monty Halls' Great Escape', which saw Halls attempting to become totally self-sufficient by only eating what he caught, grew or shot himself, netted 2.6m viewers and a 10% share of the audience.
Five's airing of 'White Chicks', a comedy from the directors of 'Scary Movie' and 'Scary Movie 2', scored 1.4m viewers and a 5.4% share of the 8-10.15pm audience.
On ITV1 later in the evening 'Piers Morgan's Life Stories' attracted 3.9m viewers and a 21.4% share of the 10-11pm audience. This week Morgan interviewed Ulrika Jonsson, who spilled the beans about her affairs, her lonely upbringing in Sweden and her rise to fame.
On Saturday BBC One and ITV1 kicked off with new series of returning child-friendly dramas in primetime, giving a fresh look to their schedules.
'Robin Hood' returned with 5.6m viewers at 6.50-7.35pm, garnering a 25.6% share of the audience, but was pipped at 6.50-7.20pm by ITV1's 'Harry Hill's TV Burp'.
'TV Burp' delivered 5.9m viewers, a 27.5% share, and was followed by the start of the third series of monster-hunting drama 'Primeval' at 7.20-8.20pm.
ITV set up a special extra for 'Primeval' fans watching live online by adding a window beneath the video player showing live Twitter comments about the show.
The first of ten episodes brought in 5.3m viewers and a 23.6% share. It fell short of the 6.1m (27.4%) who watched BBC One's National Lottery game show '1 vs 100', featuring the draw, at 7.35-8.25pm.
The 6.4m who watched Casualty at 8.25-9.15pm gave BBC One the day's biggest audience and a 28.5% share.
ITV1 moved Chris Tarrant gameshow 'The Colour of Money' from its earlier slot, where it managed 4.1m viewers last week, to 8.20-9.20pm, where it brought in only 2.7m for a 12.2% share.
The Thomas Cook Foreign Exchange sponsored show has three more outings left before the end of the series.
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