I would guess:
McGee: Not really sure. For some reason I'm torn between ISTJ and INTP, even though they're rather different. I don't think I remember what he was like well enough.
Abbey: ENFP. I think she shows a lot of Fi. Or maybe it's Fe. She could be ENTP.
Ducky: He's tricky but I'd say INTP. He talks a lot, which would naturally make you think E, but he seems thinking dominated, has a huge bank of useless knowledge he's obviously interested in, which makes me think P, happy staying around by himself and analysing things carefully.
Palmer I don't remember enough of to comment.