S5, E13: When truck and squad are summoned to the scene of a dangerous accident, Chief Boden (Eamonn Walker) makes a split second decision that overrides Chief Anderson (guest star Michael Hanrahan), the incident commander whose house was the first to respond to the call. Feeling his authority was undercut and his reputation damaged, Anderson uses his power to make things miserable for Boden and all of House 51 feels the repercussions. Meanwhile, Severide (Taylor Kinney) contemplates a major life changing decision, Herrmann (David Eigenberg) does a good deed and Brett (Kara Killmer) looks to make some personal changes to herself.