With the suspects still at large and conditions worsening underground, first responders race to reach the trapped victims, while the investigation into the assailants comes into focus.
The crossover starts on Chicago Fire S13E11 In the Trenches (I) and Chicago Med S10E11 In the Trenches (II).
s12e01 - Ten Ninety-Nine
s12e02 - Blood Bleeds Blue
s12e03 - Off Switch
s12e04 - The After
s12e05 - Water and Honey
s12e06 - Pawns
s12e07 - Contrition
s12e08 - Penance
s12e09 - Friends and Family
s12e10 - Zoe
s12e11 - In the Trenches (III)
s12e12 - The Good Shepherd
s12e13 - Street Jesus
s12e14 - Marie
s12e15 - Greater Good
s12e16 - Seen and Unseen
s12e17 - Transference
s12e18 - Demons
s12e19 - Name Image Likeness
s12e20 - Black Ice
s12e21 - Open Casket (1)
s12e22 - Vows (2)
District 21 of the Chicago Police Department is made up of two distinctly different groups: The uniformed cops who patrol the beat and deal with street crimes, and the intelligence unit, the team that combats the city's major offenses, such as organized crime, drug trafficking and high-profile cuddles. Leading the intelligence team is Sgt. Hank Voight, a man not against skirting the law in the pursuit of justice.
Demanding and tough, only those who can take the heat survive under Voight's command. Take Det. Antonio Dawson, for example. Despite a troubled history with his boss, Dawson has ambitions of running the unit. If that means facing off against Voight every day, he'll persevere. From the street cops with dreams of moving up to the elite crew who are already in, life on the job is a daily challenge.