A few weeks ago Chief Boden and Donna visit the doctor to find that their baby is in the high risk category. They made another visit together for an ultrasound and revel in seeing their baby on screen for the first time. However, the checkup takes a tough turn when the doctor reveals that Donna may suffer from placenta previa, a condition that puts her at high risk for a life-threatening hemorrhage in her third trimester. They struggle with the news, but some good comes with the unknown as Donna decides to ask about the sex of the baby, and it’s a boy.

A call sends the whole team out to a scary crash where a helicopter teeters on the roof of a building, still smoking. Severide finds the pilot and two passengers still inside and rushes to save all three as pieces of the roof crumble to the ground. Brittany arrives on the scene, terrified for Severide’s safety. Severide and Brittany fight afterwards until she reveals that the chopper catastrophe reminded her of a fatal crash from her past. Which says a lot about her but begs the question of how long can she keep up with Severide on the job?

Across from the rooftop disaster, Otis and Herrmann locate the helicopter rotor in a nearby backyard and find a woman pinned underneath it. Herrmann attempts to keep the victim calm as Otis slowly dismantles the rotor in order to lift it off of her. When they manage to save her, Otis finds a damaged remote control drone. Dawson confirms the connection when she follows a small blood trail to a shed, where a bludgeoned kid confesses to flying the drone with his brother. Casey and Cruz find his brother barely conscious and surrounded by live wires in a transformer cage, having fallen off the roof after the helicopter clipped him. They disentangle the kid and pull him out, making a narrow escape before the live wire touches the boy’s blood.

Brett and Mills locate another massive piece on top of a van with an injured driver inside. But the driver refuses to cooperate, an issue that confounds Brett until she spots a bag full of passports and licenses. She continues to treat him up, even after he reveals a gun and then rejects further treatment. The next day, he tails Brett and corners her in alley. Instead of confronting her, he apologizes and hands her a business card: she can contact him for anything, anytime, no questions asked. It’s his thanks for her saving his life. A bit awkward coming from a guy with fake passports in Chicago.

Back at the firehouse, Casey notices Brett and Cruz whispering and misinterprets it as another firehouse romance. To end Casey’s curiosity, Brett reveals Cruz’s other as a highly rated Zumba instructor as we saw last week. The secret spreads through the firehouse in record time and results in the entire squad ambushing Cruz at the next class. Cruz shocked that the firehouse knows lets it side and gives them a hell of a work out. WORK IT CRUZ!!! See was that so bad of him to reveal that? Now we got more to come with this sneak peak.

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