Today on the re-broadcast if they do today's rebroadcast at about 4:15pm or so he gets in a conversation with a guy about slavery and it lasts about 20 minutes so if you atheist want a good understanding of what slavery was all about in the Old Testament you should listen about 4:15pm to about 4:30pm Pacific time.
http://www.christiannetcast.com/listen/player.asp?station=kspd-am