The host is Del Tackett. Tackett is one of the most knowledgeable and sincere men I have ever listened to. His chief theological expert is the venerable RC Sproul. Sproul is undoubtedly one of the greatest Christian Intellects of our time. Another of the series' Philosophical / Theological experts is Ravi Zacharias. I don't care how well-versed you are in Christian Apologetics and Worldview, you will be blown away by the freshness that Del, Ravi, R.C., Os, and numerous others bring to the table.