Where is the Unity live tutorial on heightmaps and terrain sculpting?

Mike Geig did some live tutorials and on his live training from Oct 21, 2013, he is using a scene created in his previous tutorial from I believe the 14th of the same month. Unfortunately, I can't find that tutorial and am having difficulty following his Oct 21 tutorial. Where is the live tutorial having to do with heightmaps and terrain sculpting? Otherwise, is there another one I can use to recreate the scene on my own? Thank you.