Melissa Center

Bex Henderson must fight to have the Hunting Party team reinstated so that they can catch the infamous "Boogeyman" killer, Ron Simms, who is currently at large and targeting women who are searching for love.

The Wrong Guy. Severide steps in as ranking officer at 51. Kidd fights to save her Girls on Fire program. Cruz's family is threatened when someone from Javi's past resurfaces.

April's visiting sisters get on her nerves; when Matthew and Jackson witness an accident, they must work together; Callie and Arizona work on their relationship.

Ben worries that an innocent conversation with Derek could end up causing problems for Bailey; Cristina turns to Shane as tension with Meredith increases; April's upcoming wedding creates an uncomfortable situation for Stephanie and Jackson.

A betrayal intensifies the issues between Cristina and Meredith; Matthew and April make a decision about their relationship; Bailey faces difficulties with Ben's return.

Johnson looks to get her relationship with Masters back on track while Masters does his best to find satisfaction elsewhere.