Well, I said maybe I should do it, so here I am, making a list of all the mysteries I've left unsolved in various chapters of the Series That Will Not Leave Me Alone (tm).
Actually, I'm just listing the ones I remember off the top of my head - at least the ones that have been brought up by someone. I'll leave filling in the blanks to you guys in comments, and I'll just add them to the list.
Thar be spoilers ahead! Ye be warned.
So. Here goes:
Earnest Victory
1) What was Emily's original trauma that Haley was referring to?
2) Which 'her' was Hotch referring to that Emily wanted to ask out? Answer: JJ (
raphael0877)
World Like Sunlight
1) What does Hotch have to do with the situation?
2) What the heck happened to make Reid react like that?
3) Where's the rest of the team?
Controlling Compassion
1) What did Morgan do with two cases of ammunition in Marshall Parish?
Protecting Empathy
1) What issue did Haley have to get Hotch to agree to concerning Morgan?
Uncertain Logic and/or This Wicked World: Five Things That Never Happened to Tobias Hankel
1) Did Elle ever make it to Marshall Parish?
2) Did she manage to help Morgan?