The Guardian revealed today how UK troops were scrambled to the Iranian border when five British men were kidnapped in Baghdad in May 2007.
In a special edition of our daily podcast, Maggie O'Kane, editorial director of GuardianFilms, which revealed last month how the hostages were taken to Iran, outlines Tehran's involvement in the abduction.
Julian Borger, our diplomatic editor, explains why the British foreign office has been so reluctant to point the finger at Iran.
And we look at the the Islamic Republic's aims as it continues to extend its influence in the region.
Watch the full Guardian film here.
