Cruz's erratic behavior escalates and Shay is forced to make a tough decision.
The anguish that haunts Cruz over his previous actions boils over, as he puts himself and his fellow firefighters in jeopardy. Casey and his sister Christie try to solve their issues with their mother and each other. Meanwhile, Severide reaches out again to an important person from his past as a favor to Lieutenant Whaley and the squad gains new perspective after assisting the bomb squad on an extremely dangerous call.
Cruz's torment jeopardizes his fellow firefighters.
While Severide confronts his shoulder problems head on, Casey must make an unexpected new commitment as his mother's parole hearing nears.
Severide (Taylor Kinney) finally addresses Chief Boden (Eamonn Walker) about his injury and makes some important personal decisions about his future. Meanwhile, Casey (Jesse Spencer) struggles with family matters and Dawson (Monica Raymund) takes matters into her own hands when she discovers a young girl who is the sole survivor at the scene of a rescue call. Lauren German, Charlie Barnett and David Eigenberg also star. Sarah Shahi, Kathleen Quinlan and Nicole Forester guest star.
Severide (Taylor Kinney) faces the consequences of his injury -- and an uncertain future.
Emotions run high at the station when a horrific accident hospitalizes one of their own.
Eaten up by his guilt over Flaco's death in the fire, Cruz goes to Casey to confess. While Shay recovers from a head injury sustained in the ambulance crash, Severide asks Dawson for her help in dealing with his own injury. Casey is caught in the middle of a family conflict between his mother and sister. Elsewhere, Herrmann finds a business deal hard to stomach.
Cruz struggles with guilt over Flaco's death.
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