Maybe I'm just slow, but I completely missed that the man we saw come from the spaceship was the same person teaching Clark's class. Now, are we to assume that he's just taken the form of Clark's professor? Because he's apparently been at the university for a while... but then he also just came from space... or something.
But yea, this season kicks ass. The taking down of the nuke was awesome. Jor-El inhabiting Lionel was perfect. And I guess he's still in Lionel? Who knows. Not to mention the girls have been verrrry nice on the eyes so far. I approve.