One Chicago & The FBIs Wiki
One Chicago & The FBIs Wiki
Season: 8
Episode: 4
Original airdate: October 16, 2019
Teleplay by: Derek Haas
Story by: Dick Wolf
Derek Haas
Directed by: Reza Tabrizi
Episode chronology
Previous episode: Badlands
Next episode: Buckle Up


A rare but deadly bacteria takes its toll on numerous victims around the city, leaving Chicago’s finest first responders to work together alongside the CDC to resolve the dangerous situation. Following a fire at a local university that ties into the outbreak, Severide has suspicions that something bigger is happening.


Main Cast

Special Guest Stars

Guest Stars


  • Anthony Ferraris as Squad 3 Driver Tony Ferraris
  • Steve Chikerotis as District Chief Steve Walker
  • Julian Hester as John Sorenstein
  • Andrew White as Bruno Geller
  • Eunji Kim as Veronica Song
  • Ann Hagemann as Lila
  • Dylan Obrochta as Stuart Anderson
  • Joe McCauley as Mailman
  • Michele Martinez as Paramedic Michele Martinez
  • Bryan Bosque as Paramedic
  • Michelle Bester as 2nd Paramedic
  • Robin Robinson as Newscaster
  • Colt Cabana as Hazmat Leader
  • Marguerite Genard as Hazmat Member
  • Lucy Carapetyan as Administrator
  • Bryan Eng as Harrison
  • Gillian Hemme as College Student
  • Ahmed Lucan as Jared
  • Julia Germeroth as Clerk
  • Calvin Thomas as Tailgater
  • Tiera Dudley as Woman


Background information and Notes


Chicago Fire season 8
Episodes Sacred GroundA Real Shot in the ArmBadlandsInfection, Part IBuckle UpWhat Went WrongWelcome to CrazytownSeeing is BelievingBest Friend MagicHold Our GroundWhere We End UpThen Nick Porter HappenedA Chicago WelcomeShut It DownOff the GridThe Tendency of a Drowning VictimProtect a ChildI'll Cover YouLight Things Up51's Original Bell
Other Seasons Season 1Season 2Season 3Season 4Season 5Season 6Season 7Season 9Season 10