Hi Monco! I might be able to help you. I have on my computer what appears to be what you're looking for:
Episode 406 - July 20, 2012 - A.O. Scott's & Michael Phillips' Performances of the Year (So Far) - 06:26 minutes
Episode 408 - August 3, 2012 - Hobbits, Wonka and Damn It, We Were Right - 12:11 minutes
Episode 411 - August 31, 2012 - Spies, Tony Scott - 12:59 minutes
Does that sound right? Let me know and we can go from there.