S2011 E1 • Robin Gibb

S2011 E2 • Ronnie Thompson - Author and former prison officer

S2011 E3 • Bruce Riedel, Senior fellow at the Brookings Institution and former adviser to three US Presidents

S2011 E4 • Aaron Porter, President, UK National Union of Students

S2011 E5 • Jim O'Neill, Chairman, Goldman Sachs Asset Management

S2011 E6 • Youssoufou Bamba, Ivory Coast's Ambassador to the United Nations

S2011 E7 • Christina Schmid, Widow of Staff Sgt Olaf Schmid, Royal Logistic Corps

S2011 E8 • Martha Reeves, Singer, Martha and the Vandellas

S2011 E9 • Harriet Lamb, Executive Director of the Fairtrade Foundation

S2011 E10 • Nabil Sha'ath, Fatah Commissioner for International Relations

S2011 E11 • Dambisa Moyo, Economist and author

S2011 E12 • Najib Chebbi, Tunisian minister for regional and local development

S2011 E13 • Evgeny Morozov, internet analyst

S2011 E14 • Jimmie Akesson, Leader of Sweden Democrats

S2011 E15 • Karen Miller-Kovach, Chief Scientist at Weight Watchers International

S2011 E16 • Kathryn Bolkovac, Whistleblower

S2011 E17 • Juan Manuel Santos

S2011 E18 • Mortimer Zuckerman, US media owner and commentator

S2011 E19 • Kamal el-Halbawy

S2011 E20 • Pravin Gordhan, Minister of Finance - South Africa

S2011 E21 • Boris Nemtsov

S2011 E22 • Saeb Erekat, Palestinian Chief Negotiator

S2011 E23 • Ayman Safadi, Dore Gold, Nicholas Burns

S2011 E24 • Amy Chua, Author

S2011 E25 • Terry Duffy, Olivier de Schutter

S2011 E26 • Andrew Lansley

S2011 E27 • Roy Bennett, MDC Treasurer

S2011 E28 • Paddy Hill, Victim of Miscarriage of Justice (Birmingham Six)

S2011 E29 • Richard Bruton, Irish opposition politician, Fine Gael

S2011 E30 • Libya Turmoil: Guma El-Gamaty, Libyan writer and political activist; and Fawaz Gerges, Director, Middle East Centre, LSE

S2011 E31 • Dick Roche, Irish Minister for European Affairs

S2011 E32 • Ibrahim Shekarau

S2011 E33 • Malcolm Turnbull, former leader Australian Liberal Party

S2011 E34 • Clive Palmer

S2011 E35 • Christos Tsiolkas, Australian novelist

S2011 E36 • Lord Mark Malloch-Brown, Former UN Deputy Secretary-General

S2011 E37 • John Llewellyn, Former Chief Economist for Lehman Brothers

S2011 E38 • Max Mosley, Former President of the FIA

S2011 E39 • Lakhdar Brahimi, former senior adviser, UN and Arab League

S2011 E40 • Libya Intervention Debate

S2011 E41 • Maurice Glasman, British political theorist

S2011 E42 • Raghav Bahl, Managing Director of Network 18 Media, India

S2011 E43 • Sylvia Earle - Oceanographer

S2011 E44 • Jamal Fakhro, Bahrain Shura Council's Deputy President & Saeed Shehabi, Head of the Bahrain Freedom Movement

S2011 E45 • Ehud Barak, Israeli Defense Minister

S2011 E46 • Alexander Lebedev, Russian businessman and media owner

S2011 E47 • Mikhail Margelov, Russia's Special Envoy to Africa

S2011 E48 • Jean Ping

S2011 E49 • Lamido Sanusi, Governor of the Central Bank of Nigeria

S2011 E50 • PJ Crowley - US Assistant Secretary of State for Public Affairs 2009-2011