Apparently I can't find the Humbug (6x11) episode thread... It's linked with The Grey Man (6x08) episode
That episode made me think about Joelle and her involvement with Callen...
It's strange how neither Michelle nor Hetty knew about her CIA-background... I know that Granger has never heard about Joelle nor have seen a picture of her...
It was clear that Joelle knew what was going on and was waiting for an excuse to break up & end her "undercover mission"...
I can't recall why she got involved with Callen in the first place! Nor what Sabatino had to do with it!