Power Girl (2009-) #15
Got to say I know we have to suspend disbelief with the whole secret identity thing in comic books, and secret identities are one of the most interesting parts with super heroes so I am willing to go with it. But if the dude had not figured out Karen was Power Girl after that I would have so questioned how he was supposed to be so smart. lol.
Fun little 2 part story there. Really enjoyed it.