Investigating claims that lucrative Olympic contracts have been handed to Putin's friends.
Reporter Alistair Jackson investigates the tactics of the country's police firearms units.
John Sweeney investigates the secretive world of the family courts.
The story the jury never heard behind the murder of Drummer Lee Rigby.
Paul Kenyon visits a Romanian village where many men have left to pursue work in London.
Donors and charity workers say the quest for money is undermining the mission.
Tom Heap sorts the rhetoric from the reality in the politics of power bills.
Richard Bilton investigates the Global Fund, whose inspector general was fired.
How well does online retailer Amazon treat the workers who retrieve our orders?
Reporter Adam Shaw goes in search of affordable homes for ordinary working families.