I think Lex is obsessed with finding out about the car crash. That whole room is dedicated to that, Clark, and that hexagonal disk. He's gonna be trouble. I hope his friendship with Clark isn't just a way to get close!
I thought at first that maybe he was just affected by the meteor shower, but you just reminded me about the coordinates. Maybe he is...excuse me...was an alien. He is brain dead, so I'm guessing he won't come back.
Yeah, Martha's been pregnant for like one or two episodes, I think. You really haven't missed much of that storyline. Don't worry.