Deanna Reed-Foster

When the crushed body of a young teen who ran away from a treatment center for troubled girls is found in an abandoned building, Voight sends Halstead undercover as a guard to investigate the center from the inside.

Tal enlists the help of his colleague to track Kimmer's whereabouts; furthering their investigation, Tal and Mariah look to an old friend of The Judge for answers.

Dawson and Casey face legal issues as they try to retain legal guardianship of Louie; Severide continues to look for a bone marrow procedure to help Anna; Brett opens up to Dawson.

Casey and Dawson run into a problem when they apply to permanently adopt Louie; Jeff Clarke gives an interesting proposition to Severide; Otis persuades Herrmann to throw a party at Molly's to celebrate the bar's 100th anniversary.

Severide agrees to a bone marrow donation; Casey and Dawson attempt to find harmony at home; Otis and Mouch plan to create a PSA to encourage people to join the Chicago Fire Department.

Dawson must make a tough decision about a father who is addicted to painkillers; Herrmann gets into an altercation with a police officer; Otis and Cruz go on a mission to find out who Brett is dating; Donna's brother unexpectedly comes to town.