While Calder returns to the States, Annie and Auggie focus on making Henry pay for his misdeeds and bringing him to justice.
Following a lead on Henry, Annie, Auggie and Calder travel to Hong Kong without CIA sanction. Joan and Arthur discover a traitor.
Annie heads to New York with new intel on Henry. Joan finds a solid lead from FBI Agent Rossabi as Arthur’s court date nears.
Henry gets in touch with Calder, his only ally at Langley, to find Annie. Joan and Arthur are at odds by something Joan discloses during her deposition. Helen lets Auggie know she still has feelings for him.moreless
Joan has some questions for Auggie. Calder and Auggie come up with an alternate way to destroy Henry.
Annie is separated completely from the CIA and all her support systems as she starts a deep undercover operation totally on her own. Annie is determined to bring Henry to justice in a way that vindicates Arthur. But Annie's "death" leaves Auggie, Joan and Arthur to deal with the consequences.moreless
Annie must dodge attackers while making a last desperate effort to take down Henry and finds herself facing off with Calder.
New information sends Annie to Copenhagen to prevent Teo's latest mission. Calder's allegiances become known to Auggie. Top defense attorney, Bianca Manning, is hired by Arthur to save the Campbell name.
Joan and Calder clash over Annie's meeting with known terrorist Teo. Annie tries to convince Teo to turn against one of his own people as part of the plan to bring down Wilcox. Auggie is in some serious trouble.moreless
Annie teams up with a seasoned operative to hunt for the five stolen missile launchers and she's prepared to play hardball. Back home, Auggie deals with past demons while Calder is even more suspicious of Annie.moreless
Annie insinuates herself into the FBI's investigation of Seth's death. When FBI Agent Vincent Rossabi tells her that traces of skin were found under Seth's nails, Annie has only a small amount of time to cover her tracks. Henry offers Annie the opportunity of a lifetime.moreless
Calder makes himself Annie's handler and sends her to Vienna to seek out a Greek arms dealer. Calder forbids any communication between Annie and Auggie while she's on her mission. Arthur and Joan discuss how Calder is probably Henry's new mole inside and how they can get out in front of Henry's game.moreless
Annie and Auggie find that their new romance is straining their work relationship. Arthur and Henry have a serious disagreement. Teo and Auggie are hiding information from Annie.
Annie heads to Colombia to figure out Teo's true allegiances. A series of interviews could determine Joan's future at the CIA.
After a major eye-opener at the CIA, Auggie and Arthur try to work out Henry's next move. Joan confides in Annie.
Annie builds her new relationship with Wilcox while getting used to her new romance with Auggie. Annie and Auggie head to Colombia where they meet up with CIA station chief Calder and later with rebel leader Teo.moreless
Chief Boden takes action to try to help a boy who was seen at two fires previouly, one firefighter is on medical leave after an accident at a fire and Casey and Dawson are gradually seeing each other.moreless
Severide's injury gets worse, an abusive mother makes terrible decision and a train accident takes life of a young person.
Thanksgiving at the firehouse includes a 10-car pileup, a gang shooting, and a meth lab.
When Dawson faces suspension the girl she saved decides to help her. Detective Voight does everything he can to make Casey retract his statement. A dangerous action during an apartment fire may change Casey's situation.moreless
Severide seeks an old friend's help with his injury, a disciplinary action is taken against Dawson and Casey has to deal with the aftermath of opposing Detective Voight.
An elderly woman needs Severide's help, Detective Voight tries to persuade Casey not to testify against his son, Chief Boden is accused of leaving a homeless man to die in a warehouse fire and Shay comes face to face with a man from her past during a call.moreless
Casey has to decide if he should report that a cop's son is responsible for a drunk car accident that left a teen paralyzed. Meanwhile Severide is diagnosed with a fractured vertebra and Mills has trouble sharing his time between his mother and the job.
Lt. Kelly Severide tries to keep his shoulder injury a secret as he helps a construction worker from a collapsed building. Meanwhile two teenagers are stuck in a vehicle.
While Nick and Hank look for rare coins that were the target of an robbery that ended in homicide, a friend of Aunt Marie's arrives with information for Nick about his family.
An underground fight club where monsters participate in blood battles is tied to a murder that Nick and Hank are investigating.