"Infection, Part III" is the fourth episode of Season 7 of Chicago P.D. It is the conclusion of a three-part One Chicago Crossover event with spinoffs Chicago Fire and Chicago Med. The event starts with "Infection, Part I", and continues with "Infection, Part II" and concluding with said episode.
Summary[]
After zeroing in on the suspect responsible for the bio-terrorism that’s gripping Chicago, the PD prepares to undertake their biggest manhunt yet. Upton is torn between helping track down the perp and providing emotional support to the scared young girl that needs her. Voight fears his team is being sent on a wild goose chase.
Cast[]
Main Cast[]
- Jason Beghe as Sergeant Hank Voight
- Jesse Lee Soffer as Detective Jay Halstead
- Tracy Spiridakos as Detective Hailey Upton
- Marina Squerciati as Officer Kim Burgess
- Patrick John Flueger as Officer Adam Ruzek
- LaRoyce Hawkins as Officer Kevin Atwater
- Lisseth Chavez as Officer Vanessa Rojas
- Amy Morton as Desk Sergeant Trudy Platt
Crossover Cast[]
- Jesse Spencer as Matthew Casey
- Taylor Kinney as Kelly Severide
- Kara Killmer as Sylvie Brett
- David Eigenberg as Christopher Herrmann
- Joe Minoso as Joe Cruz
- Christian Stolte as Randall McHolland
- Miranda Rae Mayo as Stella Kidd
- Annie Ilonzeh as Emily Foster
- Eamonn Walker as Wallace Boden
- Nick Gehlfuss as Will Halstead
- Yaya DaCosta as April Sexton
- Torrey DeVitto as Natalie Manning
- Dominic Rains as Crockett Marcel
- S. Epatha Merkerson as Sharon Goodwin
- Alberto Rosende as Blake Gallo
- Daniel Kyri as Darren Ritter
- Randy Flagler as Harold Capp
- Anthony Ferraris as Tony Ferraris
- Jeremy Shouldis as Marty Peterson
- Lorena Diaz as Nurse Doris
- Amanda Marcheschi as Nurse Dina
Recurring Cast[]
- Paloma Nozicka as Carrie Seldon
- Alejandro Raya as Officer Caswith
Guest Cast[]
- Aaron Serotsky as David Seldon
- Kathleen Munroe as Dr. Andrea Danover
- Eileen Galindo as Mama Alma Garcia
- Kyla Kenedy as Amanda
- Ben Wilson as Officer Murphy
- Julian Hester as John Sorenstein
- Louise Lamson as Dr. Heather Holcomb
- Javier Gutierrez as Driver
- Brett Lee as Shipp
- Paul Zinke as Jordan
- Sheri Winkelmann as Woman
- Christopher R Ellis as FTO
- Andrea Adams as Patrol Officer 1
- Ricky Bartlett as Security Guard 1
- Grant Stokes as Board Member 1
- Scot Morton as Board Member 3