Every day this week there seems to have been a big story in the news about the relationship between openness and personal privacy.
Tonight David Grossman will be investigating what we should be allowed to know, and we'll be joined by a panel of journalists, lawyers and others to debate privacy laws, super injunctions and Twitter revelations.
Then historian and author of England's Mistress, Kate Williams will be doing an authored piece asking what all these sex scandals tell us about 21st Century sexual behaviour in Britain.
click here to see where to watch or .
Ready to Watch Newsnight, Season 2011, Episode 91?