Chaon Cross

For the firefighters, rescue squad and paramedics of Chicago Firehouse 51, no occupation is more stressful or dangerous, yet so rewarding and exhilarating.

Shea and LeBlanc steal an important hard drive and enlist Ben, Gina and C.M. to help decrypt it; Ted and his Zava team buckle down on their search for NEXT; Ty and Ethan hide out in a remote cabin.

Severide hides his serious shoulder injury as he tries to rescue a construction worker from a collapsed building; two teens are trapped in a vehicle.

Mills questions Bennie about the fire that killed Mills' father; Casey, Severide and Bennie investigate two mysterious diner fires.

A failed rescue attempt deeply affects the men and women of firehouse 51; Dawson and Shay deal with a junkie's crazy behavior during a call; the team upsets local drug dealers.

The firehouse crew goes to the scene of a railroad accident; Boden must make a big decision about his future; Severide learns more about the woman he saw with his father; Shay and Dawson continue to butt heads.