Peter DeFaria

Cruz feels the burden of his increased responsibilities. Kidd, Gallo and Carver get caught in the middle of a gang war on a call. Herrmann wrangles Trudy for help lifting Cindy's mood.

While Antonio (Jon Seda) continues his off-duty security job for Asher (guest star Michael Park) and Layla (guest star India De Beaufort), Asher is killed. Voight (Jason Beghe) and Olinsky (Elias Koteas) make sure Antonio is covered. While they work the case Halstead (Jesse Lee Soffer) and Lindsay (Sophia Bush) go undercover in a rather uncomfortable location. Kot (guest star Chris Agos) shows up to ask Lindsay for an answer.

Dr. Manning (Torrey DeVitto) returns from maternity leave and helps treat a teen with a long history of medical issues. Dr. Choi (Brian Tee) attends to a former Navy shipmate with a potentially life-threatening ailment and goes above and beyond the scope of his duties to ensure he gets the proper treatment. Saudi Prince Faisal (guest star Lymen Chehade) arrives at the hospital for a planned surgical procedure, but only from Dr. David Downey (guest star Gregg Henry), the hot-shot surgeon who takes a shine to the work of Dr. Rhodes (Colin Donnell). Meanwhile, a budding romance between Sarah (Rachel DiPillo) and hospital lab tech Joey (guest star Peter Mark Kendall) looks hopeful, but April (Yaya DaCosta) might think otherwise.

Battalion Chief Boden (Eamonn Walker) prepares to counterattack McLeod (guest star Michelle Forbes) in a final effort to save the firehouse from closure and the romance between Dawson (Monica Raymund) and Casey (Jesse Spencer) escalates. Leon (guest star Jeff Lima) is making progress in the gang murder investigation, but Cruz (Joe Minoso) cannot stand being left in the dark by Voight (guest star Jason Beghe), fearing for his brother's safety. Meanwhile, Severide (Taylor Kinney) and Katie (guest star Brittany Curran) bond to make up for lost time and Otis (Yuri Sardarov) feels uncomfortable living with Severide and Shay (Lauren German) after Devon's (guest star Vedette Lim) latest escapade.

Lt. Severide (Taylor Kinney) hits the top of the list as Det. Lindsay (guest star Sophia Bush) starts calling in suspects with the clearest motives to make the guy who kidnapped Katie disappear. Meanwhile, Jones (guest star Daisy Betts) is still having trouble fitting in as word of her disruptions reach the fire department's headquarters. Elsewhere, Herrmann (David Eigenberg) celebrates his twentieth anniversary with his wife, but no one supports his idea on the gift he intends to give.