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Season 4

70 :04x01 - Let It Burn

Oct/13/2015
Lt. Casey, who is at the center of an undercover operation to bring down a trafficking ring run out of Nesbitt's strip club, finds himself in very dangerous territory. Meanwhile, as a result of the high turnover rate on squad, Severide gets a rude awakening when Capt. Dallas Patterson is brought in, much to Boden's dismay. Dawson confirms her suspicions that her life is about to change forever and Jimmy Borrelli, the new candidate, makes an unusual first impression. Elsewhere, citizens of Chicago band together to take charge of their neighborhood in protest of a drug den in their area, resulting in ramifications that severely hinder members of Firehouse 51, who are called to the scene to battle a blazing fire.

Source: NBC
Guest Stars: Steven R. McQueen as Firefighter Jimmy Borrelli | Brian White (2) as Captain Dallas Patterson | Randy Flagler as Capp | Jon Seda as Detective Antonio Dawson | Jason Beghe as Sergeant Hank Voight | Eric Mabius as Tom Nesbitt | Fredric Lehne as Deputy District Chief Ray Riddle | Nick Gehlfuss as Dr. Will Halstead | Rachel Nichols as Jamie Killian | Izabella Miko as Katya Antov | Susannah Flood as Athena Bailey-Johnson | Andy Ahrens as Danny Borrelli |
Co-Guest Stars: Anthony Ferraris as Tony | DuShon Brown as Connie | Phillip Edward Van Lear as Agent Conway | Leah Bostic as Resident | Jack McLaughlin-Gray as Carl | Brad Einstein as Ian | Chris Rickett as Instructor | Donica Lynn as One Angry Resident | Nicholas Vukasovich as Tomov | Marcus Farne as Middle Management Type | Jarrod Zimmerman as Federal Agent | Ricky Wayne as Patrolman DeLuca | Marcus Hendricks as Uniformed Officer | Courtney Rioux as Medic #1 | Gregory Fenner as Pizza Delivery Guy | Regina Saldivar as Alicia | David Midura as Tank Top |
Uncredited: Anne Lockhart as Dispatcher
Director: Joe Chappelle

71 :04x02 - A Taste of Panama City

Oct/20/2015
Members of the firehouse are frustrated with their inability to help Chief Boden, whose job is on the line pending an internal investigation in the aftermath of a complicated call to a fire. Meanwhile, Lt. Severide struggles to accept his smaller role and adjusts to the presence of Capt. Patterson, his new commanding officer. Dawson shakes things up on the work front and Casey attempts to find a crucial piece of evidence in his ongoing investigation against Nesbitt. Elsewhere, Herrmann struggles to keep the peace with Molly's newest neighbors.

Source: NBC
Guest Stars: Steven R. McQueen as Firefighter Jimmy Borrelli | Randy Flagler as Capp | Jason Beghe as Sergeant Hank Voight | Amy Morton as Desk Sergeant Trudy Platt | Brian White (2) as Captain Dallas Patterson | Yaya DaCosta as Nurse April Sexton | Fredric Lehne as Deputy District Chief Ray Riddle | Eric Mabius as Tom Nesbitt | Rachel Nichols as Jamie Killian | Susannah Flood as Athena Bailey-Johnson |
Co-Guest Stars: Anthony Ferraris as Tony | DuShon Brown as Connie | Stephen Eugene Walker as Nick Duffy | Mindy Bell as Suzie Wilder | Phillip Edward Van Lear as Agent Conway | Jack McLaughlin-Gray as Carl | Bernard Balbot as Reginald | Erin Noel Grennan as Neonatal Nurse Campbell | Frank Meo as PIC | Mike Cherry as Jackal #1 | Kate Smith (3) as Nicole | Kenny Richards as Armored Guard Driver | Cyril Smith (2) as IA Officer Fitzgerald | Ken Remer as Cop |
Uncredited: Anne Lockhart as Dispatcher

72 :04x03 - I Walk Away

Oct/27/2015
The pressure on Firehouse 51 is at an all-time high as the internal affairs investigation into the handling of a recent fire picks up steam. Just when it appears that game-changing evidence comes to light that would serve to bail out Chief Boden, new twists emerge that put his head right back on the chopping block. Brett and Chili respond to a routine call and quickly find themselves in a life and death situation to help aid a stabbing victim who is bleeding out. Meanwhile, a stuck elevator summons the house to a high-rise hotel that tests everyone's mettle and candidate Jimmy Borrelli is conflicted when his older brother Danny looks to get him transferred to a different house.

Source: NBC
Guest Stars: Steven R. McQueen as Firefighter Jimmy Borrelli | Randy Flagler as Capp | Brian White (2) as Captain Dallas Patterson | Fredric Lehne as Deputy District Chief Ray Riddle | Rachel Nichols as Jamie Killian | Nick Gehlfuss as Dr. Will Halstead | Brian Geraghty as Officer Sean Roman | Andy Ahrens as Danny Borrelli | Oliver Platt as Dr. Daniel Charles |
Co-Guest Stars: Anthony Ferraris as Tony | DuShon Brown as Connie | Mark Hengst as Roger Maddox | Stephen Eugene Walker as Nick Duffy | Leah Bostic as Resident | Mindy Bell as Suzie Wilder | Lyric Ross as Girl | Ben Hertel as Stabbing Victim | Laquis Harkins as Mom | Charin Alvarez as Tricia | Michael Kingston as Building Engineer | Cam Dupre as Damon | Frederic Stone as Elevator Engineer | Joe Bianco as Sketchy Guy | Jennifer Weigel as Newscaster | Jose Santiago (1) as Steve | Erin Noel Grennan as Neonatal Nurse Campbell | Regie Cashaw as Mr. Travers | D'wayne Taylor as Dad | Cathleen Coyle as Waitress |
Uncredited: Anne Lockhart as Dispatcher
Director: Tom Di Cillo

73 :04x04 - Your Day Is Coming

Nov/03/2015
One of 51's own needs the support of the entire house to recover from a near disaster. Meanwhile, Herrmann has to figure out a way to reopen Molly's after it gets shut down and Severide digs deeper into the arson investigation, while struggling to cope with one of his toughest days yet.

Source: NBC
Guest Stars: Steven R. McQueen as Firefighter Jimmy Borrelli | Randy Flagler as Capp | Jon Seda as Detective Antonio Dawson | Robyn Coffin as Cindy Herrmann | Brian White (2) as Captain Dallas Patterson | Rachel Nichols as Jamie Killian | Nick Gehlfuss as Dr. Will Halstead | Susannah Flood as Athena Bailey-Johnson | Caleb Hunt as Craig "Mouse" Gurwitch |
Co-Guest Stars: Anthony Ferraris as Tony | Stephen Eugene Walker as Nick Duffy | Brad Einstein as Ian | Bob Beck as Gary | Schoen Smith as Assistant | Manny Buckley as Paramedic | Stella Martin as Obstetrician | Jaden Klein as Kevin Sullivan | Russ Williamson as Lionel | Cheridah Best as Nurse | Richard Strimer as Noah | Ian Paul Custer as Anthony | Courtney Cavanagh as Maura Sullivan |
Uncredited: Anne Lockhart as Dispatcher
Director: Reza Tabrizi

74 :04x05 - Regarding This Wedding

Nov/10/2015
After a fire ruins a neighborhood wedding, Boden steps up to host the ceremony at the firehouse. That's much to the chagrin of his boss, Chief Riddle, whose political aspirations have caused friction from within the firehouse. Meanwhile, Dawson, who returns to the house, also butts heads with Riddle over her ability to perform and is forced to defend herself despite Boden's support. Severide finds himself fighting for his way back to his old position and Capt. Patterson is caught between loyalty towards leadership and loyalty to his colleagues.

Source: NBC
Guest Stars: Steven R. McQueen as Firefighter Jimmy Borrelli | Randy Flagler as Capp | Brian White (2) as Captain Dallas Patterson | Fredric Lehne as Deputy District Chief Ray Riddle | Gordon Clapp as Chaplain Orlovsky | Yaya DaCosta as Nurse April Sexton | Nick Gehlfuss as Dr. Will Halstead | Marina Squerciati as Officer Kim Burgess |
Co-Guest Stars: Eric Lynch (1) as Officer Dichter | Anthony Ferraris as Tony | DuShon Brown as Connie | Frank Wiltse as Coach | Leo Milano as Mitchell | Brandon S. Lewis as Best Man | Angelica Herndon as Becca | Maureen Gallagher as Neighbor | Aaron Norman as David | Shad Kunkle as Cop #1 | Cerall Duncan as Becca's Mother | Jonah D. Winston as Large Naked Man | Theo Allyn as Petite Naked Woman |
Uncredited: Anne Lockhart as Dispatcher
Director: Joe Chappelle

75 :04x06 - 2112

Nov/17/2015
Chief Boden meets his new neighbor, who asks him for a favor that leads to serious consequences. Severide takes offense to being treated like a candidate by Captain Patterson by undermining him during a call and the situation reaches a boiling point. Cruz receives a surprise visit from his past when Freddie, a gangbanger who knows Cruz's brother Leon, comes to visit and ask for a favor. Elsewhere, the team is called to a harrowing scene of an 18-wheeler and receive a thanks in the form of tickets to see the band Rush, much to Mouch and Herrmann's delight.

Source: NBC
Guest Stars: Steven R. McQueen as Firefighter Jimmy Borrelli | Randy Flagler as Capp | Melissa Ponzio as Donna Robbins | Marina Squerciati as Officer Kim Burgess | Brian White (2) as Captain Dallas Patterson | Fredric Lehne as Deputy District Chief Ray Riddle | Tom Amandes as Detective Ryan Wheeler | Ilfenesh Hadera as Serena Holmes | Darin Heames as Bob |
Co-Guest Stars: Anthony Ferraris as Tony | DuShon Brown as Connie | Ralph Rodriguez as Freddie Clemente | Steve Stafford as SUV Driver | Anderson Hayes as 6 Year Old Boy | Timothy "church" Lockett as Bloody Man | Mindy Fay Parks as Sally | Stephen Anderson as Uniformed Officer | Geddy Lee as Himself | Dan Lewis (1) as Uniformed Officer | Alex Lifeson as Himself | Hal Kilgore as Neil (Biker) | Carl Edwards as Delivery Guy | Tim Frank as Roadrash |
Uncredited: Anne Lockhart as Dispatcher
Director: Holly Dale

76 :04x07 - Sharp Elbows

Nov/24/2015
Chief Boden finds himself in the middle of a fiasco concerning a female neighbor, who he believes is setting him up. Severide, who is still on probation from his altercation with Captain Patterson, receives a surprise visit from his father and discovers some interesting information on Patterson that could be a game changer. Meanwhile, romance blossoms at the Chicago Fire Department gala.

Source: NBC
Guest Stars: Randy Flagler as Capp | Melissa Ponzio as Donna Robbins | Robyn Coffin as Cindy Herrmann | Jason Beghe as Sergeant Hank Voight | Treat Williams as Bennie Severide | Brian White (2) as Captain Dallas Patterson | Fredric Lehne as Deputy District Chief Ray Riddle | Tom Amandes as Detective Ryan Wheeler |
Co-Guest Stars: Anthony Ferraris as Tony | DuShon Brown as Connie | Ralph Rodriguez as Freddie Clemente | Lucinda Johnston as Ashley Daniels | Matt Fletcher as Steve | Mitchell Fain as Greg | Madrid St. Angelo as Store Manager | Chase Penny as Vespa Rider | Linda Perlin as Distracted Driver |
Uncredited: Anne Lockhart as Dispatcher
Director: Dan Lerner

77 :04x08 - When Tortoises Fly

Dec/01/2015
Chief Boden confronts Maddox, believing he is the hand behind Serena's accusations intended to skew Boden's credibility from the approaching trial. Severide reaches out to Jamie, Maddox's lawyer, in an effort to help out and Capt. Patterson questions Boden's ability to remain Chief. Meanwhile, Brett and Chili discover a man passed out in a garden that may have a connection to a call from a previous crash site and Otis looks to fill up his social calendar, but the situation hits a bump in the road.

Source: NBC
Guest Stars: Randy Flagler as Capp | Jon Seda as Detective Antonio Dawson | Melissa Ponzio as Donna Robbins | Brian White (2) as Captain Dallas Patterson | Rachel Nichols as Jamie Killian | Tom Amandes as Detective Ryan Wheeler | Ilfenesh Hadera as Serena Holmes | Rachel Dipillo as Dr. Sarah Reese |
Co-Guest Stars: Anthony Ferraris as Tony | DuShon Brown as Connie | Ralph Rodriguez as Freddie Clemente | Peter Defaria as Officer Tackett | Mark Hengst as Roger Maddox | Danny Martinez as Officer Garcia | Douglas Rainey as Officer Regan | Kyla Wenger as Debbie Greene | Chris Agos as ASA Steve Kot | Steve Mayberry as Impound Manager | Joan Kohn as Gardener | Hunter Ott as Zach Greene | Leigh Foster as Austin | Elizabeth Dowling as Receptionist |
Uncredited: Anne Lockhart as Dispatcher

78 :04x09 - Short and Fat

Dec/08/2015
Members of Firehouse 51 are less than thrilled when Captain Patterson steps in as replacement for Chief Boden while he deals with clearing his good name. When Severide learns of the potential whereabouts of Serena, Chicago P.D's Officer Atwater and Officer Ruzek head to Lake Carlyle to try and uncover additional clues on Boden's case. Meanwhile, Herrmann and Otis give Freddie a job that keeps him close by and Jimmy and Chili elicit more attention then either bargained for, causing some friction between them.

Source: NBC
Guest Stars: Randy Flagler as Capp | Jon Seda as Detective Antonio Dawson | Melissa Ponzio as Donna Robbins | Brian White (2) as Captain Dallas Patterson | Laroyce Hawkins as Officer Kevin Atwater | Fredric Lehne as Deputy District Chief Ray Riddle | Rachel Nichols as Jamie Killian | Patrick Flueger as Officer Adam Ruzek | Ilfenesh Hadera as Serena Holmes |
Co-Guest Stars: Ralph Rodriguez as Freddie Clemente | Mark Hengst as Roger Maddox |
Uncredited: Anne Lockhart as Dispatcher
Director: Joe Chappelle

79 :04x10 - The Beating Heart (1)

Jan/05/2016
Members of Firehouse 51 band together and anxiously await word at Chicago Med when one of their own falls victim to a life-threatening stabbing. Cruz urgently works with members of Chicago P.D. to track down Freddie's whereabouts when he goes missing. Dr. Choi and Dr. Halstead tend to an attempted suicide victim whose condition raises some eyebrows. Meanwhile, Mouch surprises Trudy and Chili's odd behavior has Brett and Jimmy worried.

Source: NBC
Guest Stars: Amy Morton as Desk Sergeant Trudy Platt | Marina Squerciati as Officer Kim Burgess | Yaya DaCosta as Nurse April Sexton | Nick Gehlfuss as Dr. Will Halstead | Patrick Flueger as Officer Adam Ruzek | Brian Tee as Dr. Ethan Choi | Colin Donnell as Dr. Connor Rhodes | Randy Flagler as Capp | Robyn Coffin as Cindy Herrmann | Gordon Clapp as Chaplain Orlovsky |
Co-Guest Stars: Ralph Rodriguez as Freddie Clemente | Anthony Ferraris as Tony | Alex Weisman as Paramedic Allen Chout | Ron Stevens, Sr. as Spider | Noel Jusino as Wool Cap | Michael David Hammond as Big Boy | Crystal John-demay as Resident | Lorena Diaz as Nurse Doris | Paul Fagen (1) as Oscar | Marcus Hendricks as Uniformed Officer | Amanda Marcheschi as Nurse Dina | T. Murph as Cabbie | Killian Hughes as Alex |
Uncredited: Anne Lockhart as Dispatcher
Director: Reza Tabrizi

80 :04x11 - The Path Of Destruction

Jan/19/2016
A tornado threatens the city and Herrmann discovers the path may hit close to home. Chili and Brett lock heads when Chili makes a critical mistake that leaves a victim breathless, prompting Brett to report to Chief Boden regarding Chili's erratic behavior. Meanwhile, Otis pleads for Dawson to help him solve his women troubles and Severide is asked to lend assistance to agent Alex Ward from the Department of Homeland Security regarding a suspicious home.

Source: NBC
Guest Stars: Jon Seda as Detective Antonio Dawson | Robyn Coffin as Cindy Herrmann | Brian Tee as Dr. Ethan Choi | Liza J. Bennett as Agent Alex Ward | Randy Flagler as Capp |
Co-Guest Stars: Lucas Jade Zumann as Lucas Hicks | Ralph Rodriguez as Freddie Clemente | Anthony Ferraris as Tony | Maureen Mizener as Dawn Hicks | David Von Kampen as Lee Henry Herrmann | Lucas Vonkampen as Luke Herrmann | Barbara Zahora as Gail | Michael Collins (1) as Newscaster | David Zarbock as Store Manager | Mia Park as Nurse Beth | Jaslene Gonzalez as Seizure Woman |
Uncredited: Anne Lockhart as Dispatcher

81 :04x12 - Not Everyone Makes It

Jan/26/2016
Herrmann goes to court to testify against Freddie, but when the perpetrator's father reaches out to beg forgiveness for his son's malicious attack, a tormented Herrmann is left to figure out what to do. Following the aftermath of the recent tornado, Lt. Casey learns the makeshift shelter housing victims is on the brink of shutting down. At the request of Alderman Colin Becks, Casey attends a fundraiser and is thrown into the spotlight, only to quickly discover that his good intentions might not have the impact he was hoping for. Dawson and Brett feel the repercussions after telling Boden about Chili's recent erratic behavior. Meanwhile, Severide helps Agent Alex Ward solve a homemade explosives case and Otis receives a welcome surprise.

Source: NBC
Guest Stars: Ralph Rodriguez as Freddie Clemente | Liza J. Bennett as Agent Alex Ward | Armand Schultz as Alderman Colin Becks | Randy Flagler as Capp | Robyn Coffin as Cindy Herrmann | DuShon Brown as Connie |
Co-Guest Stars: Ski Carr as Luis Clemente | Chris Agos as ASA Steve Kot | Anthony Ferraris as Tony | Lucas Jade Zumann as Lucas Hicks | Maureen Mizener as Dawn Hicks | Jesse Bob Harper as Father | Mary Cross as Mother | Leslie South as Judge | Leah Urzandowski as Girlfriend | Derek Dziak as Carlos | Charlie Newhart as Corrections Officer | Howie Johnson as Sergeant Conroy | Lucas Vonkampen as Luke Herrmann | David Von Kampen as Lee Henry Herrmann | Stan Adams as Liquor Store Clerk | Cori Munro as Volunteer | Jennifer Cudahy as Woman |
Uncredited: Anne Lockhart as Dispatcher
Director: Reza Tabrizi

82 :04x13 - The Sky Is Falling

Feb/02/2016
The firehouse is on high alert when mysterious threats begin to emerge throughout Chicago. The situation turns dire when news of a mass shooting brings members of squad and truck into the middle of a dangerous and harrowing scene. Lt. Casey works diligently to investigate the missing money from the fundraiser for the victims of the recent tornado. Meanwhile, Jimmy agrees to represent the firehouse in the first annual "Battle of the Badges" boxing match against the 21st district police department and Chili's erratic behavior continues to be a major issue for her ambulance partner, Brett.

Source: NBC
Guest Stars: Jon Seda as Detective Antonio Dawson | Brian Tee as Dr. Ethan Choi | Liza J. Bennett as Agent Alex Ward | Armand Schultz as Alderman Colin Becks | Barbara Eve Harris as Street Deputy Chief Emma Crowley | Randy Flagler as Capp | Amy Morton as Desk Sergeant Trudy Platt |
Co-Guest Stars: Emily Berman as Jen Brenner | Anthony Ferraris as Tony | DuShon Brown as Connie | Steve Chikerotis as District Chief Steve Walker | Sam Poretta as Paramedic Chief Hatcher | Steve Wojtas as SWAT Team Leader Carson Hicks | Doug McDade as DHS Superior | Wardell Clark as Security Guard | Darian Tene as Screaming Woman | Clayton Louis as Alderman's Aide | Robin Robinson as TV Anchor | Andy John Roesgen as TV Anchor | Brandon Markell Holmes as Young Man | Patrick Gannon as Asthmatic Victim | Angelica Roque as ND Paramedic |
Uncredited: Anne Lockhart as Dispatcher

83 :04x14 - All Hard Parts

Feb/09/2016
Lt. Severide confronts Chili about his suspicions regarding her erratic behavior, but she does not take too kindly to his intentions. Meanwhile, members of the firehouse rally around Lt. Casey, who they believe is a perfect candidate to run for the position as Alderman and Jimmy faces off against Antonio in the first annual "Battle of the Badges" boxing match.

Source: NBC
Guest Stars: Jon Seda as Detective Antonio Dawson | Holly Robinson Peete as TBD | Brian Geraghty as Officer Sean Roman | Rachel Dipillo as Dr. Sarah Reese | Amy Morton as Desk Sergeant Trudy Platt | Patrick Flueger as Officer Adam Ruzek | Marina Squerciati as Officer Kim Burgess | Anthony Ferraris as Tony | DuShon Brown as Connie | Aaron Lamm as TBD | John Lister as TBD

84 :04x15 - Bad For The Soul

Feb/16/2016
Firehouse 51 responds to an odd call from a neighboring firehouse and the unusual circumstances prompt Severide and Cruz to take the investigation into their own hands to search out the real story. The truck welcomes new firefighter Stella Kidd, but her addition has repercussion inside the firehouse. Meanwhile, Casey moves forward in his run for alderman, but begins to realize that some voters have their own personal agendas for wanting him elected.

Source: NBC
Guest Stars: Miranda Rae Mayo as Stella Kidd | Colin Donnell as Dr. Connor Rhodes | Holly Robinson Peete as TBD | T.J. Jagodowski as TBD

85 :04x16 - Two Ds

Feb/23/2016
Casey continues his run for alderman, but a citywide propaganda attack against his campaign makes him reconsider his candidacy. The rescue squad is summoned to the scene of a man trapped inside of a burning car with suspicious evidence suggesting that that the fire may have been intentionally set. Mouch's upcoming bachelor party looms, but with Trudy's nerdy brother Larry handling the details, everyone fears for the worst. Meanwhile, Jimmy and Brett take a kidnapping investigation into their own hands.

Source: NBC
Guest Stars: Amy Morton as Desk Sergeant Trudy Platt | Zack Pearlman as Larry | Miranda Rae Mayo as Stella Kidd | Anthony Ferraris as Tony | Corey D. Williams as TBD | Brandon Jay McLaren as TBD
Classification: Scripted
Genre: Action | Adventure | Drama
Status: Returning Series
Network: NBC ( USA)
Airs: Tuesdays at 10:00 pm
Runtime: 60 Minutes
Premiere: October 10, 2012
Episode Order: 23
This guide is currently edited by:
wmulder (Challenge)