Thanks to lostingreeceblog for the following.
OK I know this may be nothing, but what the heck.
I was just browsing IMDB's Zuleikha Robinson's (Ilana) page and found that she is listed as cast for episode 6x01 in January. And if you look in the 6x01 page itself, it also mentions Elizabeth Mitchell and Nestor Carbonell.
Now this may be, as I already said, nothing, but something is good during the hiatus right?
Source: lostingreeceblog via IMDB