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?
What will happen if the Islamic State loses its state? David Aaronovitch investigates.
Egypt's Muslim Brotherhood won at the polls but failed to keep power. What went wrong?
Lyse Doucet talks to a group of former hostages of so-called Islamic State.
William Crawley explores the beliefs of Islamic State following the Paris attacks.
Peter Oborne investigates why HSBC closed the accounts of several prominent Muslims.
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.
The impact of the Arab Spring on the global reach of the Muslim Brotherhood.
A former radical jihadi changed his mind and is now speaking out against extremism.
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.
Was David Cameron right to order an investigation into the Islamist organisation?
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'.