Alister McGrath holds the Chair in Theology Education at King's College, London. He is also President of the Oxford Centre for Christian Apologetics (OCCA) and Senior Research Fellow at Harris Manchester College, Oxford. For many years, Professor McGrath was Professor of Historical Theology at Oxford University. He holds first class honours degrees in both Chemistry and Theology from Oxford University and was awarded an Oxford DPhil for his research in the natural sciences. His many writings include his acclaimed book on apologetics, Bridge Building, and his internationally popular Christian Theology: An Introduction. He has a special interest in atheism, especially evident in his landmark books Dawkins' God: Genes, Memes and the Meaning of Life, The Dawkins Delusion? and The Twilight of Atheism.

Ravi Zacharias is President of RZIM and Senior Research Fellow at Wycliffe Hall, Oxford. He received his Masters of Divinity from Trinity International University in Deerfield, Illinois, and has been conferred a Doctor of Divinity degree from both Houghton College and Tyndale College and Seminary, Toronto, and a Doctor of Laws degree from Ashbury College, Kentucky. Dr Zacharias has spoken in over fifty countries and in numerous universities, notably Harvard, Princeton, and Oxford. He has addressed the writers of the peace accord in South Africa, the President cabinet and parliament in Peru, and military officers at the Lenin Military Academy and the Centre for Geopolitical Strategy in Moscow. He has given the main address at the National Day of Prayer in Washington, D.C., and has also spoken at the Annual Prayer Breakfast at the United Nations in New York. Dr Zacharias has written many books, including the Gold Medallion winner, Can Man Live Without God. His weekly radio programme, 'Let My People Think' is broadcast over 1500 stations worldwide.

Amy Orr-Ewing is Director of Programmes for the Oxford Centre for Christian Apologetics and Training Director for RZIM Zacharias Trust. She gained a first class degree in Theology at Christ Church, Oxford University, before receiving a Masters degree in Theology at King’s College, London. Amy has written two books exploring key questions in apologetics: Why Trust the Bible? (published under the title Is the Bible Intolerant? in North America) which was shortlisted for the 2006 UK Christian Book Awards, and But Is It Real? (USA title: Is Believing in God Irrational). She has contributed to the books Beyond Opinion, God and the Generations and Worth Knowing: Wisdom for Women. Amy speaks and lectures on Christian Apologetics worldwide, at events such as Keswick Convention, and the European Leadership Forum, Hungary.

John Lennox is Professor of Mathematics at Oxford University, Fellow in the Philosophy of Science at Green College, Oxford. He studied at Cambridge from which he holds the degrees of MA and PhD and was subsequently Reader in Pure Mathematics at the University of Wales where he was awarded a DSc. He also holds an MA in Bioethics. Professor Lennox is interested in the interface of Science, Philosophy and Theology and has lectured and written many articles and several books on both mathematics and Christian apologetics. He has debated a number of the world's leading atheists including Christopher Hitchens at the Edinburgh Festival (2008), and Richard Dawkins in both Alabama, USA and Oxford, England. His books include God's Undertaker: Has Science Buried God? and Christianity: Opium or Truth? (co-authored with David Gooding). Professor Lennox's teaching for the OCCA includes material on Science and Religion, New Atheism and Ethics.

Tom Price is an Academic Tutor at the OCCA, Associate speaker of the RZIM Zacharias Trust, and an independent itinerant evangelist/apologist. He studied Philosophy at university and later completed an MA in Christian Apologetics. Before studying for his Masters, Tom worked for the University and Colleges Christian Fellowship (UCCF) as the founding editor of their apologetics website bethinking.org Currently, as well as his work with the OCCA, Tom is also very involved with Damaris - an educational charity that seeks to help people across the world explore spiritual and moral issues underlying their contemporary culture. He enjoys spending time with those who are asking difficult questions about God, philosophy, life, love, and work.