Sandra Delgado

Severide (Taylor Kinney) feels sidelined as he leaves Detective Lindsay (guest star Sophia Bush) and the Intelligence Unit to do their job and locate his sister Katie (guest star Brittany Curran). Shay (Lauren German) gets an unusual tip from Chicago Blackhawk players Brent Seabrook and Duncan Keith, who makes friends with Clarke (guest star Jeff Hephner) and stop by Molly's. Meanwhile, Casey (Jesse Spencer) learns more about his head injuries after another close call and Dawson (Monica Raymund) pushes hard to pass the physical test at the Academy.

While Bishop Egan denies Tomas permission to perform the exorcism on Angela’s daughter, Father Marcus breaks out of Saint Aquinas and joins forces with Tomas, though he urges him to get his ex, Jessica, out of his life and heart. The Rance family’s relationship with the demon deepens and when Marcus catches Angela stealing holy water, he instructs her on how to use it. On Chicago’s South Side, a series of bizarre ritual killings begin taking place.

The team is hired by Jim McKenna, a researcher who tried to blow the whistle on his employer for creating dangerous genetically-modified cauliflower, but in the process was fired and had his life ruined. The team enacts a plan to convince his former colleague to leak documentation to validate McKenna’s claims and expose their employer. However, in the midst of the plan, Clark suffers from a meltdown that leaves him bedridden. In an effort to get him back on the case, Ross stoops to new lows. Meanwhile, Latrell struggles to find the funds to pay the company’s employees as the firm’s finances begin to pile up.