- 4.04 "The Finger in the Nest" Discussion
- 4.05 "The Perfect Pieces in the Purple Pond" Spoiler Discussion Thread
- 4.06 The one where Booth got his new chair.
- 4.07 "The He in the She" discussion
- 4.08 "The Skull in the Sculpture" Discussion
- 4.09 'The Con Man in the Meth Lab' discussion
- 4.10 "The Passenger in the Oven" discussion