The big day has finally arrived for Platt (Amy Morton) and Mouch (Christian Stolte). But will Platt's cold feet prevent them from tying the knot?

On Tuesday's episode of Chicago Fire, Platt starts to get major pre-wedding jitters. "One of our first dates was in a hot air balloon," she says tearfully. "I almost threw up in that thing, twice. Ever since then it has been nonstop cooking classes, wine tasting, macramé, square dancing classes. I'm exhausted."

Exclusive Chicago P.D. sneak peek: Burgess scores a surprise invite to Platt's wedding

Fortunately, Dawson (Monica Raymund) and Burgess (Marina Squerciati) are there to calm her down — although it doesn't seem like Burgess is doing a great job keeping Platt away from the "alcohol and such-what."

Check out an exclusive sneak peek here:

Chicago Fire airs Tuesdays at 10/9c on NBC.