(When did Don punch a suspect, though? It's usually CIA guys, is it not?)

I think it may have been the case with the guy he arrested basically because his instincts said to and I think they were going to blow up a bank. I may be wrong about the particular ep but I remember being annoyed that there were no consequences for him roughing up a suspect in front of the suspect's lawyer.

Personally I think Robin's the only woman Don has ever had chemistry with--she gets to mess up his hair, heh.

I think he kind of did with Liz. Not affection, really, but attraction.