Warning: This story contains major spoilers from the winter finale ofChicago Fire.
Read at your own risk!
Love was in the air in a major way for the milestone 100th episode and midseason finale ofChicago Fire.

Credit: NBC
ENTERTAINMENT WEEKLY: What were your thoughts when you first realized episode 100 would also be the winter finale?
… And then No.
When are we going to do it?

Parrish Lewis/NBC
And what if its a surprise?
Can we fool the audience long enough to keep it a surprise?
So those two things were what we built the episode around.
Talk about the choice to have Dawson and Caseys sudden decision to get married be a non-verbal exchange.
And then it was cool that Bretts the one who sees it and knows what was happening.
Where it really came from is we wanted them in their firehouse gear getting married.
Which feels like its right for our show.
Louies biological father popped up in this episode wanting him back is he going to be around for long?
Its going to be awhile but it does have an ending.
I think that the way we go with it is going to be surprising.
All of Gabbys mama bear instincts come out.
What were your goals going into Severides storyline?
How much fun was writing Herrmanns big speech?
What can you share about the two-hour crossover withChicago P.D.when we come back in January?
Its one of Severides best performances in both episodes.
Chicago Firereturns on Jan. 3 on NBC.