Catholic Apologist, Mr. Vic Scaravilli teaches Catholics how to explain and defend the faith when Mormon missionaries appear on your doorsteps. Included is a testimonial from one of his students.

A good series of articles on Mormonism, written by Mr. Scaravilli, is Doing Apologetics with Mormons.

The second video instructs how to take the initiative and enter into dialog with Mormons by asking them 4 key questions.

Speaking with Mormon Missionaries (Parts 1-4).

Four Questions for Mormons.