4x10: Blood Debts
4x09: Dark Waters
4x07: Brotherhood
4x06: Lost Souls
4x04: Beyond Redemption
4x03: Restoration
2013-09-10: Bill Dedman
2013-09-09: Sheri Fink
2013-09-05: Michael C. Hall
2013-09-04: Mario Livio
2013-09-03: Andrew Harper
2013-08-15: Simon Pegg
2013-08-14: Regis Philbin
2013-08-13: Joshua Oppenheimer
2013-08-12: Sen. Rand Paul
2013-08-07: Lake Bell
2013-08-06: Liam Hemsworth
2013-08-05: Neal Thompson