Bitsie Tulloch, David Giuntoli Bitsie Tulloch, David Giuntoli

Welcome to the calm before the Grimm storm.

When the fantasy procedural wraps up its third season on Friday (9/8c, NBC), the fun begins when Monroe (Silas Weir Mitchell) and Rosalee (Bree Turner) start the final countdown to their big day. The last thing to check off the list is the celebratory rehearsal dinner. What could possibly go wrong there?

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Check out this exclusive sneak peek of MonRosalee's friends and family giving their pre-wedding toasts:

That wasn't too bad, was it? But was that really Juliette (Bitsie Tulloch) who gave the speech? Last we saw, that meddling Hexenbiest Adalind (Claire Coffee) had created a potion to impersonate the veterinarian. Need a reminder? Watch the latest episode here.

Grimm airs Friday at 9/8c on NBC.