Francis Schaeffer Lecture Collection

Wheaton College has an online archive of resources - which includes a large collection of lectures by the late Francis Schaeffer. The list can be found here (or broader index here), but here are a few that may be of apologetic interest:
• Christian Apologetics
• Christianity & Science
• Intellectual Proof & Faith
• Modern Man & Epistemology
• On the Problem of Evil & the God of Love part 1 | 2
• The Inspiration of Scripture
• The Question of Apologetics
• Basic Philosophical Questions
• and lots more here... 

Enjoy.