[*M*a*TT*H*ew*]

Here are the series average ratings for all seven series of Big Brother, starting with the most watched:

BB3 - 5.8 million
BB5 - 5.0 million
BB7 - 4.7 million
BB1 - 4.7 million
BB4 - 4.6 million
BB2 - 4.6 million
BB6 - 4.4 million

Hopefully, BB8 will be a big improvement on BB7, maybe getting an average of 5.1 million or maybe 5.3 million would be justify it.