http://www.channel4.com/listings/C4/...t=2&position=2
To answer all your questions
There is definitley no Saturday Show
Davina has her own show called "Big Brother: On the Couch"
Davina McCall takes a look back at the key events of the week and talks to leading experts from the field of psychology and cultural commentators about how life in the most watched house in Britain is affecting its residents.
And the show on Sunday will not be as long and the same as always 1 hour.