When Big Brother planned to plant a mole in the house, I bet the last person they viewed as a threat was dippy Brian.

However, Brian revealed to housemates last night that he had been watching the Australian version of the show religiously before entering the house and was well aware of this years housemates and goings on.

This could be a problem for the British actress, Thaila Zucchi, as she will be required to act as if she has just left the Australian BB house, and yet if Brian quizzes her on housemates or tasks, will she know enough to bluff him?

The plot thickens!