In this episode we commence our study of the Eucharist. The Catechism explains why it is a sacrament and when it was instituted. It also sets forth the various names for this sacrament and why it is only one sacrament although contained under the species of bread and wine. As a supplement to our study we read several articles from Question 73 in the thrid part of the Summa Theologica. (IIIa. Q. 73. a.1-5)