The first sneak preview from this week's Grey's Anatomy showed us just how far Mark is willing to go to woo Lexie, even if she has no idea and he blatantly uses Jackson.

Three more clips give us an idea of some of the drama faced by other characters Thursday as well. Dr. Karev, for example, makes a bad first impression on Dr. Lucy Fields.

Actually, that's putting it mildly. Disastrous better describes this Alex scene:

Follow the jump for two more clips from "P.Y.T. (Pretty Young Thing)," in which Lexie treats her father and learns about somebody he met in AA. Hint: It's not a sponsor.

Elsewhere, Arizona and Callie argue over her pregnancy. Mark is kind of useless, but this arrangement is quite funny ... unless you're last name happens to be Torres:

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.