The promo begins with the firehouse performing a rescue they’ve done a thousand times.

Cruz is left behind as everyone evacuates the building after performing a search and rescue

because he finds a victim. Outside, Severide realizes that he has been in the building

for a while, and his oxygen tank is running out. Cruz makes it out eventually, but the oxygen debt in his body is so big that he keels over. Elsewhere, at home, things have not been going well for him and his wife. Chicago Fire‘s showrunner Andrea Newman teased this arc to TV Insider, saying, “Cruz and Chloe will come to a big realization in Episode 12 about what’s been eating away at their relationship, and once they put this fine point on it, they’ll have to see if and how they can manage it. They love each other, and they have made an amazing family together, so the stakes are high.”

Violet and Chief Robinson Clash Again “Violet has definitely had to step up in multiple ways as PIC, especially when it comes to dealing with Lennox and Novak. In terms of Chief Robinson, we always find the best adversaries are the ones who also make a good point and aren’t completely in the wrong. With Robinson’s mantra of accountability and her righteousness, there are some ways that she and Violet are actually alike, which only makes it trickier (and more fun!) to navigate that combustible relationship. And Lennox will play a big role in that.” On the lighter side, Capp and Tony attempt to break a world record. Catch the episode this Wednesday at 9 PM on NBC.