Has the west or its allies entered into an unspoken alliance with Al Qaeda in Syria?
Frank Gardner talks to former allies of Osama bin Laden who have turned against him.
What risks do returning jihadis from IS in Iraq and Syria pose in the UK?
Beirut became a crucible of terrorism in the 1980s. Fergal Keane revisits the city.
What will happen if the Islamic State loses its state? David Aaronovitch investigates.
Lyse Doucet talks to a group of former hostages of so-called Islamic State.
Owen Bennett-Jones asks, what exactly is the Lebanese Shia movement Hezbollah?
William Crawley explores the beliefs of Islamic State following the Paris attacks.
The rapid rise, fall and legacy of the self-styled Islamic State.
Does so-called Islamic State still pose a threat to Syria and around the world?
Former jihadi Aimen Dean explains how Islamic State came to power and how it survives.
Mike Thomson reports on an extraordinary series of diaries on life inside 'Islamic State'.
Isis Thompson talks to others who share their name with the radical Islamist State group.
An email from Al Qaeda deputy leader Ayman al-Zawahiri to the group's Yemeni branch.
BBC Middle East editor Jeremy Bowen looks back on the rise and fall of Islamic State.
Jeremy Bowen finds himself in Sudan on the trail of Osama bin Laden.
The British Muslims who joined Jihad in Afghanistan, Bosnia and Kashmir in the 80s and 90s
Former al-Qaeda member Aimen Dean talks about his eight years undercover as a British spy.
Born in the USA? Alistair Cooke reflects on Al-Qaeda's use of home grown terrorists.
David Aaronovitch untangles the ideological threads that make up the 'Islamic State'.