Ripley and Charles treat a patient with OCD. Hannah and Archer encounter a woman with a foreign object lodged in her heart. Crockett clashes with the Chief of Oncology.
Kira goes into labor with Keiko's child. Odo buys an infant changeling from Quark that was found drifting in space.
Severide and Seager team up to investigate a fire at the home of a troubled young woman. Pelham moves into 51's rumored cursed office. Kylie assists Kidd with Girls on Fire.
When Brian learns his estranged wife Carol will be passing through Boston, he tries to intercept her in order to win her back.
Famed attorney William M. Kunstler (guest starring as himself) is hired to defend a female political activist (guest star Mary Joan Negro) who went underground 20 years ago to avoid murder charges.
