The firehouse is on high alert when mysterious threats begin to emerge throughout Chicago. The situation turns dire when news of a mass shooting brings members of squad and truck into the middle of a dangerous and harrowing scene. Casey works diligently to investigate the missing money from the fundraiser for the victims of the recent tornado. Jimmy agrees to represent the firehouse in the first annual "Battle of the Badges" boxing match against the 21st district police department. Chili's erratic behavior continues to be a major issue for her ambulance partner, Brett.
Elenco: Jesse Spencer , Taylor Kinney , David Eigenberg , Joe Minoso , Christian Stolte , Eamonn Walker , Yuriy Sardarov , Kara Killmer , Monica Raymund , Miranda Rae Mayo , Charlie Barnett , Lauren German , Annie Ilonzeh , Alberto Rosende , Dora Madison , Steven R. McQueen , Daniel Kyri , Hanako Greensmith .