Full Episode Summary
After nearly dying in the apartment fire, Casey has recovered and returns to Station 51. Shay's new partner Allison gets along with everybody but seems to have a beef with her. Dawson's firefighter training begins at the academy, while Severide prepares to be an instructor. Meanwhile, Clarke is the perpetrator of the murder and won't talk to any cops, while business at Molly's is really starting to dwindle.