Jacqueline Williams

After a neighbour is stabbed, Dr Choi enlists the help of April to figure out the real cause of the incident. Meanwhile, Noah misdiagnoses a patient, and Dr Reese's estranged father comes to Dr Charles, as a patient, without her knowledge.

Burgess and Atwater come across a gunshot victim and the only witness is Olinsky's daughter, and Ruzek goes to Burgess for help with an undercover mission.

Detective Lindsay calls in suspects in the disappearance of Katie's kidnapper, Jones struggles to fit in, and Herrmann celebrates his 20th wedding anniversary.

Burgess works with her first criminal informant to track down a ruthless pimp and break up his prostitution ring.

Boden tries to keep the firehouse from closing, the romance between Dawson and Casey grows, Cruz worries about his brother's safety, and Severide and Katie make up for lost time.

House 51 comes under investigation for negligence after interim chief Pridgen makes a grave tactical error during an apartment fire.