User blog comment:Bob the Wikipedian/2012 mid-season cliffhangers/@comment-24.145.138.105-20130118213948

Nick took the key in the last episode. It's probably not in the trailer and there is no reason to expect that Renard wil ever get his hands on it. What Renard might do with it reeally is irrelevant.

Also - Bud is now well aware that Juliette has no idea what a Grimm is. I don't see how that would be a cliffhanger either way.