Marquis Rodriguez

Chief Boden makes a risky last minute decision to save his men; Dawson continues to deal with her father; Brett's childhood friend visits and strikes the attention of someone within the firehouse; a fire at a high school hits close to home for Boden.

Chief Boden turns up the pressure on Severide and Casey to investigate the cause of the fire that trapped his wife; Mouch is over-competitive in the firefighter muster challenge.

When an envelope containing a picture appears at the precinct, the detectives pick up the trail of a child pornographer.

When a suspect confesses to murdering a celebrity chef, Baez and Danny don't believe him; a longtime friend's request for help puts Frank in a tough position.

Brian and Ellen form a plan to escape with their children; Duncan's wife wants to stop her treatment.

A rogue FBI agent takes Dr. Ellen Sanders hostage after she is chosen to operate on the president, threatening to kill her and her family unless she assassinates him during the surgery.