In tonight's Big Brain, Dermot will be joined by psychologist Geoffrey Beattie and Dr Harry Witchel.
In the first part of the show Dermot and psychologist Geoffrey Beattie will be putting their heads together to discuss Pete and his ladies.
In the past week Pete has become the main attraction for Lea, Nikki and Aisleyne. But what has he got that the other male housemates haven't? And why exactly has Pete got himself into such a pickle? All will be revealed tonight.
In part two, Dermot will be joined by Dr Harry Witchel to discuss so-called 'me-me's'. We've all noticed that the housemates have their own individual wordplays, tunes, ideas, catchphrases and even moods. These little foibles -- referred to as 'me-me's - are under the spotlight tonight.
Finally, Dermot and his brainy guests will be discovering which of our housemates is the most conscientious.
Join Dermot for Big Brother's Big Brain, tonight on Channel 4 at 11.05pm.
www.channel4.com/bigbrother