The producers merged two rival camps in last night's show after three members of the basic camp threatened to quit the series.
Former TV presenter Esther Rantzen, politician Robert Kilroy-Silk and singer Simon Webbe all said they were planning to leave the show after rain turned their camp into a bog.
The episode was watched by a 32.6% share of the audience between 9pm-10pm, trailing the opening episode which had 8.9m viewers and Monday's 8.2m viewers.
The show comfortably won its 9pm slot, with BBC One's 'New Tricks', normally a ratings winner, only managing to earn a lowly 3.9m viewers and a 16.3% share of the audience between 9pm-10pm.
A 'Horizon' documentary called 'How Mad Are You?', in which the programme makers pondered the line between sanity and madness, brought BBC Two 1.7m viewers and a 6.9% share of the audience between 9pm-10pm.
A documentary about the story of Prince John, the son of George V and Queen Mary, who died at the age of 13, gave Channel 4 a more than respectable 2.2m viewers and an 8.8% share of the audience.
'Prince John: the Windsors' Tragic Secret' pulled in 2.3m viewers and a 9.3% share of the audience, including viewers on Channel 4+1.
Five's popular US import 'CSI: Miami' grabbed 2.3m viewers and a 9.3% share of the audience between 9pm-10pm.
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