When a tanker collides into a commuter train that subsequently crashes into a warehouse, the firehouse is called to the horrific scene that tests everyone to the limits as life and death hangs in the balance. With the ultimatum in place for him or th... (more)e firehouse, Boden is tasked with making life-changing decisions regarding his future. Severide learns more about Katie, the young woman he saw with his father. Meanwhile, Shay and Dawson are still at odds and Casey’s responsibility of being a surrogate father takes a sharp turn.

Brittany Curran, Chaon Cross, Dylan Baker, Jeff Hephner, Larisa Polonsky, Linda Powell, Michelle Forbes, Treat Williams, Vedette Lim