Lots of murmurings about what's going to be in 'Catch-22'... and lots of spoilers if you need to know.
.
.
.
What we know for sure is that it's a Desmond-centered episode and will probably feature another temporal adventure "flasharound" if you want to call it that.
"Can't I have a little bit of the spoilers?"
I'm not even going to quote anything here, its just too spoilerous.
Link 1:
Exclusive! A Second Look at Catch-22/D.O.C Caps Reveal the 'Unlikely Nemesis', and more!Link 2:
Speculation Time... What do you think of this?