It turns out Hetty's old friend Harris Keane (Jeff Kober) was able to provide Callen and Kilbride with some more information. Believe it or not, Hetty was in Syria to meet with Al-Qaeda leaders in order to negotiate the release of some hostages. She couldn't say who they were exactly, but evidently the Al-Qaeda leader was al-Kalmira. Hetty didn't know that, and sadly Harris lost contact with her.