“I’m so excited about that particular episode because of what they’ve done and how they put this together. It’s bigger set pieces and action scenes than really almost anything I’ve ever done,” Mulroney told MovieWeb. “I’m on this incredible show that’s a well-oiled machine…
They give it their all, and it’s a tall order. And all of those actors rise to the occasion every time. I’m so impressed and inspired, and having a great time in Chicago playing Chief Pascal. So stay tuned, especially for that crossover.” Mulroney continued about the crossover:
“That’ll play like a three-hour movie, the same incident. So usually, I think Fire plays second on the Wednesday night lineup.

Dermot Mulroney in Chicago Fire
NBC
So in this one, we start it because… it starts with Fire, then goes to Med, and then finally, they screw all the bolts down at the end with Chicago PD.
But we all play in each other’s shows. So that’s what’s so fun, that I got to act across it with the other actors from the other shows… It’s really fun for me.”