An undercover investigation reveals life behind bars in Britain's prison system.
Sophie Hutchinson investigates the troubled state of NHS mental health services.
The mystery of an elderly American man who was found lost on the streets of Hereford.
Panorama investigates whether the new ban on legal highs is working.
Panorama reports on Russia's role in Donald Trump's election victory.
Jane Corbin looks at the security failings that led up to the 2015 Tunisian terror attack.
John Simpson looks back over his 50-year career as a BBC foreign correspondent.
Peter Taylor investigates the escalation of the use of lone jihadis by IS.
Hilary Andersson meets Americans who feel disillusioned by the electoral process.
Reporter Deborah Cohen investigates expensive add-ons sold at some fertility clinics.