Spoiler Alert:
The hot blonde chick was killed by the Pakistani ISI officer she was working. Phillip & Elizabeth broke her bones to fit her in a suitcase to get the body out of the Pakistani's hotel room.
Liz is friends w/ the Korean lady to get Level 4 clearance for William. Korean lady's hubby works at the same bio lab. Now that she'll be blackmailing the hubby, the friendship will end. And it's pretty much the only American friend that she has.
Not sure what the point of finding the porn was. Possibly it gave her the indication that the only way to blackmail Don was to do him (or as the case may be, fake doing him).
Oooops, sorry, forgot about the HS girl. Described the wrong one for you. :doh: