Firefighters, paramedics, doctors, and cops are having fun, relaxing and throwing around a football. In other words, they're enjoying a day off.
But the threat interrupts the fun
A man collapses, and when they look at his leg, they see they're dealing with some sort of flesh-eating bacteria. Is he the first case or will they learn someone else has been brought into a hospital with the same infliction?
Two calls, same building
Paramedics respond to two more cases like it in the same apartment building.
Firefighters are hosed down. There are isolation chambers. And toward the end of the trailer, it doesn't look like those under quarantine are handling it too well.
The CDC is called in
They're dealing with something they haven't encountered before, which means they have to call in the experts. But this isn't an outbreak, they later learn. It's an act of terrorism.
Intelligence may get eyes on the suspect
After discovering that all of the victims came from the same apartment building, they discover someone in a Hazmat suit was walking toward a blue pickup truck two blocks away in the time frame.
The cops aren't the only ones kicking down doors
We see Kevin doing just that for Intelligence, but we also see Foster doing the same, likely responding to a 911 call for someone who has been infected.
The threat clears the streets of Chicago
How eerie is this?!
Their terrorist is also an arsonist
At least, we can assume that the same person out there with the weaponized bacteria is the one responsible for burning down a lab to cover his tracks. Could he have worked there?
Who's Casey tackling?
Are they looking for this guy, or is he simply acting suspicious at the scene? What's in the backpack?
Did Jay get eyes on their suspect?
It looks like the building's being evacuated. Does Jay have his gun out because he's seen the suspect or there's a report he's there?
Is Hailey infected?!
An infected woman collapses on her, and Hailey ends up covered in her blood. She's put in quarantine as they try to determine if she's at risk.
One Chicago is preparing for "some sort of apocalyptic event" during the big crossover.
NBC released the trailer for the three-hour event, "Infection," which starts over on Chicago Fire, moves to Med, and concludes on P.D. on October 16. And there is quite a bit going on across the three shows.
What do you think of the newest member of Truck 81?
As you can see, there is going to be plenty of crossover with the characters in all three episodes and not just during the crisis. In fact, the first responders are enjoying a bit of downtime when it all begins.
Watch the trailer below and click through the gallery above for a sneak peek at the threat overtaking the city — and which character may be the most in danger.
One Chicago Crossover, Wednesday, October 16, 8/7c, NBC