Chief Boden prepares to counterattack McLeod in a final effort to save the firehouse from closure and the romance between Dawson and Casey escalates. Leon is making progress in the gang murder investigation, but Cruz cannot stand being left in the da... (more)rk by Voight, fearing for his brother's safety. Meanwhile, Severide and Katie bond to make up for lost time and Otis feels uncomfortable living with Severide and Shay after Devon's latest escapade.

Brittany Curran, David Pasquesi, Elias Koteas, Jason Beghe, Jeff Hephner, Jeff Lima, Jon Seda, Larisa Polonsky, Mena Suvari, Michelle Forbes