Peter DeFaria

Detective Lindsay calls in suspects in the disappearance of Katie's kidnapper, Jones struggles to fit in, and Herrmann celebrates his 20th wedding anniversary.

Manning returns from maternity leave and is immediately faced with a troubling case. The surgical team prepares to treat a Saudi prince.

Firehouse 51 responds to a suspicious call from a neighbouring firehouse, so Severide and Cruz investigate. Also, the team welcome a new firefighter.

Casey and Dawson apply for permanent adoption of Louie, but encounter an obstacle. Severide receives an interesting proposition.

Dawson gets into trouble during a shift at his out-of-hours job when a wealthy client who was also a known felon is murdered on his watch. Halstead and Lindsay are assigned to help investigate the case, and end up undercover in an unusual location.

Patterson questions Boden's ability to lead the firehouse as the trial approaches; Brett and Chili find an unconscious man in a garden; Otis tries to fill his social calendar.