Certain philosophers shake up the world with a new frame of reference, a new central question, a new way to proceed in doing philosophy. In the twentieth century Martin Heidegger was one such figure. His turn from the Enlightenment’s overriding concern for epistemology to a new and refigured investigation of ontology meant a new philosophical project for those who followed him, and along with that quest came a need for critical assessment of his contributions. One such assessment is S.J. McGrath’s 2008 volume Heidegger: A (Very) Critical Introduction, and Christian Humanist Profiles is happy to welcome Sean McGrath on the program to talk Heidegger with us.