http://entertainment.time.com/2013/09/27/tv-weekend-can-you-trust-homeland-again/

"That is," says James Poniewozik, "it's a version of what it might have been like if–as was apparently the original plan–Brody’s explosive vest did go off in that government shelter at the end of season 1. And it works, mostly, at least for the two hours of the season’s beginning. A series like Homeland can’t keep sprinting from crisis to crisis without devaluing the idea of crisis in general. If its big moments are to matter, then they have to be given time to land."
Read more at http://www.hitfix.com/tv-tattle#3hyDxz4kGlTD0Q6K.99