London (CNN) -- News Corp founder Rupert Murdoch, his son James and former News International chief executive Rebekah Brooks are set to appear in parliament on Tuesday to answer questions about the phone hacking scandal that has convulsed Britain.
Lawmakers will want to know what the Murdochs knew -- and when -- about the alleged illegal interception of telephone messages of individuals ranging from celebrities and politicians to murder victims and the families of those killed in terror attacks and wars.
So what is likely to happen on Tuesday and why have the Murdochs and Brook agreed to appear?
Where will the Murdochs and Brooks be questioned?
They will appear before the Commons Culture, Media and Sport committee, one of 34 select committees that act as watchdogs on government departments. Normally these committees are sober affairs in small rooms at the Houses of Parliament where lawmakers can call ministers, civil servants and other individuals to account.