"I literally yelled at the script!" he admits of tonight's wedding shenanigans. "I finished it and was like, ‘Noooo! It's crazy.'"

We already know Emma (Mays) will be looking none too happy on the big day, thanks to the emotional sneak-peek photo we scored of Ms. Pillsbury in her bridal gown—looking gorgeous, but all choked up.

And McHale, who we caught up with at last night's Topshop Topman store opening, hints that fans should expect the unexpected. "There is drama, like a whole different level of drama. It's juicy drama. It's juicy, scandalous, gossipy drama."