Marketing consultant Kimberley Davis was fired after her team's ad, featuring a character called Pants Man, failed to impress Sir Alan Sugar and judges from ad agency McCann Erickson.
The programme easily won the primetime slot with a 31.9% share of the 9pm-10pm audience.
ITV1's 'Hell's Kitchen', which saw Marco Pierre White issuing further challenges to his celebrity kitchen recruits, dropped 400,000 viewers from the previous night to 3.2m viewers and a 13.2% share of the audience.
'Grand Designs', which this week revisited a home on the banks of a secluded Scottish loch, pulled in 2.2m viewers and a 9% share of the audience on Channel 4. Including Channel 4+1 it reached 2.4m viewers.
'Restoration Revisited', an update programme revealing what has happened to the derelict buildings chosen for restoration over three series of 'Restoration', netted 1.8m viewers and a 7.4% share of the audience for BBC Two.
Five's 'Extraordinary People: The Man with Someone Else's Face' documentary, following a leading Chinese surgeon as he performs a partial face transplant on a man who was mauled by a bear, scored 908,000 viewers and a 3.7% share of the audience.