By now, if you haven't been glued to "Chicago Fire," hopefully you can catch up with Season 5. The season begins in a spiral.

Just to keep you on track, Severide (Taylor Kinney) and Stella (Miranda Rae Mayo) are on the lookout for a very unstable Grant (guest star Guy Burnet), who left "Chicago Med" without notice.

Meanwhile, Mouch (Christian Stolte) and Brett (Kara Killmer) start off on a new venture together.

12 News had the chance to chat with Kara Killmer and Miranda Rae Mayo.

"What's interesting about the show, what they don't want to do is make it seem just because we're on a TV show and we're telling these stories that somehow that means these characters are safe," said Killmer about the possibility of seeing more casualties throughout Season 5. "All of the firefighters that we represent rush into danger every single day, so there will be casualties."

Don't miss more of "Chicago Fire" every Tuesday at 9 p.m. on 12 News.