Board Thread:General Grimm Discussion/@comment-24.150.82.174-20150425155115/@comment-82.21.236.214-20150502193704

Nick has 3 keys; Kessler, Porter and Rennard. Rennard had one of the 4 royal keys but gave his family's key to Nick. We know Nick has the Porter key, though that is one we have yet to see on screen.

I have speculated that the seventh is in the hands of the wesen council and is in the spice shop.