The last instalment of the three-part drama attracted just 3.2m people, a little over 15% of the 9pm-10pm audience, compared with the increasingly popular documentary 'Rivers with Griff Rhys Jones'.
The penultimate episode of the BBC One series added 400,000 extra viewers in a week, taking its total to 5.3m -- equivalent to 22.4% share.
Next week ITV is planning to screen another two-hour drama called 'Gunrush', which follows a man seeking revenge for the death of his daughter.
On BBC2 a repeat of Top Gear was watched by 3m people, 12.6% of the available audience. Over on Channel 4 1.9m tuned in to Big Brother at 9pm (another 272,000 watched it on Channel 4+1).
Channel Five had a poor evening thanks to just 829,000 watching the Jackie Chan movie 'Mr Nice Guy'. Five attracted more than half a million extra viewers last Sunday for its straight-to-DVD Steven Seagal thriller.
On Saturday ITV1's ratings came in well behind BBC One as viewers were underwhelmed by its blockbuster movie 'King Kong'.
The Peter Jackson remake of the classic film garnered 2.3m viewers between 6.50pm and 10.15pm, which gave ITV1 a 12.5% share of viewing.
BBC One got the night's biggest audience as 'Total Wipeout' secured 4.2m viewers and a 24.6% share at 7.20pm-8.20pm.
It followed up with 50-minute National Lottery gameshow 'Guesstimation', which managed 4m viewers and a 21.6% share, and then half-hour sitcom 'Outnumbered'.
The return of 'Match of the Day' to cover the new Premier League football season brought 4m viewers to the channel at 10pm-11.20pm, accounting for 24.7% of all viewing.
On Friday at 9pm-10pm 'Big Brother' pulled in 2.4m viewers, narrowly behind ITV1's 'Kingdom' on 2.5m but well beaten by BBC One's 'Hotel Bablyon' on 3.1m.
The eviction of Freddie, formerly known as 'Halfwit', gave Channel 4 an 11.6% share of viewing in the slot and another 104,000 viewers watched it on Channel 4+1.
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