Dr. Frank Beckwith is a very well known theologian --the president of the Evangelical Theological Society, in fact-- who recently announced his conversion to Catholicism. (More specifically, Beckwith who was baptised a Catholic and raised a few years in the Church, "returned to full communion" with the Church in April.) His friend and co-author Greg Koukl is a well-known apologist who founded Stand To Reason.
Yesterday Koukl hosted Beckwith in a frank, sometimes sharp discussion of the Protestant/Catholic divide.