The fourth season of Chicago P.D., an American police drama television series with executive producer Dick Wolf, and producers Derek Haas, Michael Brandt, and Matt Olmstead, premiered on September 21, 2016 and concluded on May 17, 2017. The season contained 23 episodes. It is the final season featuring Sophia Bush as Erin Lindsay.
Contents
Cast
Regular
Jason Beghe as Sergeant Henry "Hank" Voight
Jon Seda as Senior Detective Antonio Dawson (episode 1–8)
Sophia Bush as Detective Erin Lindsay
Jesse Lee Soffer as Detective Jay Halstead
Patrick John Flueger as Officer Adam Ruzek
Marina Squerciati as Officer Kim Burgess (episode 1–19 and episode 20–23 credit only)
LaRoyce Hawkins as Officer Kevin Atwater
Amy Morton as Desk Sergeant Trudy Platt
Elias Koteas as Undercover Senior Detective Alvin Olinsky
Recurring
Samuel Hunt as Greg "Mouse" Gerwitz
Barbara Eve Harris as Commander Emma Crowley
Markie Post as Barbara "Bunny" Fletcher
Chris Agos as Assistant State's Attorney Steve Kot
Esai Morales as Chief Lugo
Nick Wechsler as Detective Kenny Rixton
Li Jun Li as Officer Julie Tay
Jules Willcox as Nicole Silver
Kevin Kane as Officer Mike Sorensen
Ian Bedford as Commander Ed Fogel
Tony Crane as Jimmy Sanguinetti
Tracy Spiridakos as Detective Hailey Upton
Special guest star
Billy Burke as Jake McCoy
Arthur-Angelo Sarinas as Loo
Crossover
Jesse Spencer as CFD Lieutenant Matthew Casey
Taylor Kinney as CFD Lieutenant Kelly Severide
Monica Raymund as CFD Paramedic Gabriela Dawson
Eamonn Walker as CFD Battalion Chief Wallace Boden
David Eigenberg as CFD Firefighter Christopher Herrmann
Yuri Sardarov as CFD Firefighter Brian "Otis" Zvonecek
Christian Stolte as CFD Firefighter Randy "Mouch" McHolland
Kara Killmer as CFD Paramedic in Charge Sylvie Brett
Nick Gehlfuss as Dr. Will Halstead
Torrey DeVitto as Dr. Natalie Manning
Yaya DaCosta as Nurse April Sexton
Rachel DiPillo as Dr. Sarah Reese
Colin Donnell as Dr. Connor Rhodes
Brian Tee as Dr. Ethan Choi
Marlyne Barrett as Nurse Maggie Lockwood
S. Epatha Merkerson as Sharon Goodwin
Oliver Platt as Dr. Daniel Charles
Carl Weathers as State's Attorney Mark Jefferies
Philip Winchester as Assistant State's Attorney Peter Stone
Production
Casting
Li Jun Li joins the cast as Officer Julie Tay for a three episode guest spot. She is set to replace Brian Geraghty's character Officer Sean Roman as Officer Kim Burgess' (Marina Squerciati) partner, after he left the series at the end of last season. On September 28, it was reported that Jon Seda as character Antonio Dawson would move from P.D. to Justice, where Antonio became an investigator for the SA's office. It was further reported on October 5 that Seda's last episode of P.D. would be episode 8.
Nick Wechsler joins the cast as Kenny Rixton, a former protégé of Voight's, for a multi-episode arc. On February 7, 2017, it was revealed that Esai Morales join the cast as Chief Lugo, a veteran of the Police Department who is trying to steer the CPD into a new style of policing. His first appearance was in the three-way crossover with Chicago Fire and Chicago Justice, before recurring throughout the remainder of the season.
Set to recur as Hailey Upton, a robbery homicide Detective, Tracy Spiridakos joins the cast, with her first episode slated to air in early May. Squerciati took maternity leave from the show in March 2017, and Kim made her temporary departure in "Last Minute Resistance".
On May 25, 2017, following the season four finale, Sophia Bush announced that she would be departing the series.
Crossovers
A crossover starting on Chicago Fire and concluding on Chicago P.D. aired on January 3, 2017.
A three-way crossover between Chicago Fire, Chicago P.D. and the premiere of Chicago Justice aired on March 1, 2017, with heavy involvement from Chicago Med.