Cairon became the second housemate this series to be evicted. The 9pm-10pm show leading up to the result of the public vote drew a 10.1% share of viewing.
The share of viewing for last week's show, when Sophia was kicked out, was 13%.
This Friday's show was watched by another 199,000 viewers on Channel 4+1.
Both BBC One and ITV1 scored above 4m viewers in the 9pm-10pm slot, with 'Hotel Babylon' shading it for the former with 4.3m viewers and a 20% share.
ITV1's 'Doc Martin' managed 4.1m viewers giving the channel a 19.6% share.
'Big Brother' got the slot's third best ratings, ahead of Five's 1.5m viewers and 7.1% for 'NCIS'. BBC two trailed with an audience of just 603,000 for 'My Life In Verse: Malorie Blackman', a 2.7% share.