Kara Killmer

Greensmith showed off her skills behind-the-scenes of Chicago Fire.

The paramedic played by Caitlin Carver had a scheme against Violet Mikami (Hanako Greensmith) that backfired.

Chicago Fire and Chicago Med showrunners gave detailed, honest explanations.

After Season 11's cliffhanger proposal, "Brettsey" fans are preparing for wedding bells.

Chicago Fire showrunner Andrea Newman reveals Brett has "a little journey for herself with her baby in her life ahead."

A small detail in the photos might tell us where Brett and Casey are headed this season. 

It's a girls club, no boys allowed.

Chicago Fire has officially begun filming Season 12.

The Chicago Fire stars had a blast on set. 

They were also joined by Chicago Med's Nick Gehlfuss and Torrey DeVitto, and Chicago Fire's Joe Minoso, and Kara Killmer.

Here's what happened with the little boy Gabby Dawson and Matthew Casey tried to adopt. 

Chi-Hards still carry a torch for these beloved characters who were taken before their times.

Chicago Fire Season 11 ended on a romantic cliffhanger — but when the director yelled, "Cut!" Jesse Spencer couldn't help but pull a cheeky stunt. 

Crossovers don't just happen on screen when it comes to Chicago Fire, Chicago Med, and Chicago P.D.

These bad guys definitely kept Firehouse 51 busy.  

The actor played the beloved Peter Mills from the jump of the show. 

Some lighthearted fun in between intense Chicago Fire takes! 

From Dawsey to Upstead, here's proof that business and pleasure can mix in the One Chicago universe. 

But how is she going to answer?

Brian "Otis" Zvonecek was a key part of Firehouse 51 for 8 seasons.