Dr. William Lane Craig continues his examination of the Lord's Supper with a deep dive into the Roman Catholic doctrine of the Eucharist as a sacrifice. Beyond transubstantiation, Catholics hold that the Mass is a propitiatory offering to God for the sins of both the living and the dead. Dr. Craig traces this doctrine from Irenaeus's early view of the Eucharist as a thank offering, through its codification at the Council of Trent, to its further development at Vatican II — exploring what it means for Christ to be "re-presented" to God in each celebration of the Mass.