Sammy A. Publes

Commander Perry (guest star Robert Ray Wisdom) notifies the Intelligence unit that Pulpo (guest star Arturo Del Puerto) has been released to help track down a dangerous cartel leader. This doesn’t sit well with our team as he kidnapped one of their own and no love is lost between sides. Meanwhile, Ruzek (Patrick John Flueger) gets some difficult news as a blast from Lindsay’s (Sophia Bush) past comes back, giving us a glimpse at where she came from. Voight (Jason Beghe) reminds her that she’s come too far to screw it up. At the same time we learn something about Jin (Archie Kao) that is bound to be a problem.

Tragedy strikes when a rescue attempt at a tenement building proves unsuccessful, leaving the men and women of firehouse 51 affected by the loss of the victim. Severide's decision to put Mills on the fast track to move from Truck to Squad doesn't sit well with some of the others and tension mounts between Severide and Casey over Heather Darden. Shay and Dawson are forced to deal with a junkie's crazy behavior while on a call and Shay considers a different way to have a family. Meanwhile, the team draws the ire of local drug dealers who threaten the peace and safety of the neighborhood and firehouse.

While out on a bank run for his off duty security job at the dispensary, Halstead (Jesse Lee Soffer) and his co workers find themselves under attack by a violent robbery crew which quickly becomes a full scale shootout. Voight (Jason Beghe) and Lindsay (Sophia Bush) question the owner of the dispensary who mentions her business has received threats from local gangs upset she's cutting into their revenue. Meanwhile Roman (Brian Geraghty), Burgess (Marina Squerciati), Antonio (Jon Seda), Halstead, Ruzek (Patrick Flueger) and Atwater (LaRoyce Hawkins) follow up on a lead and track down a potential suspect.

Tensions run high as Intelligence seeks justice for Olinsky (Elias Koteas) after he's stabbed in prison. Antonio’s (Jon Seda) loyalty is put to the test and Woods (guest star Mykelti Williamson) looks to take down Voight (Jason Beghe) once and for all.

When the squad's rig breaks down in the field, Casey (Jesse Spencer) reunites with his old friend and colleague Jason Kannell (guest star Kamal Angelo Bolden) from Squad 6, whose crew gets assigned a temporary change of quarters until the rig issue is resolved. Dawson (Monica Raymund) and Brett (Kara Killmer) serve their time in retraining, both tackling the class in unique ways. Severide (Taylor Kinney) tries to remedy what is going on with Anna (Charlotte Sullivan) and finds support from unlikely sources. As Connie (DuShon Monique Brown) returns from her family engagement, the crew lays bets on how long her temporary replacement Marcy (guest star Mia Hulen) will last.