The Conspiracy Files

On the eve of the publication of Lord Stevens's report into the death of Princess Diana, an investigation into allegations that she was murdered by the secret service.

An investigation of the growing number of conspiracy theories surrounding the 9/11 attacks. With observations from eyewitnesses, this programme tries to separate fact from fiction.

An investigation into the suspicions that still surround the death in July 2003 of the government scientist and weapons inspector, Dr David Kelly.

An investigation whether the Oklahoma City bombing was the work of lone bomber Tim McVeigh, or whether there were others involved who are being protected in a government cover-up.