Broadcast: Monday 12 March 2007 08:00 PM

Prince Charles will one day be crowned King of England - a position which by constitutional convention is politically neutral. But in this six-month investigation, Dispatches reveals a number of serious concerns: the extent of his political ambition and interference, the measures his office have employed to silence critics and questionable financial arrangements, which raise questions about his suitability for the throne and the future of the monarchy.