This episode was a huge improvement compared to the previous episodes. The cases were interesting and this time they weren't rushed. One case brought some interesting dilemma's for Casey as he had to deal with a dirty cop who wanted to protect his son at all costs. He stood his ground and did the right thing but there might be consequences.
Severide was dealing with his own dilemma, he learned he has sustained a serious injury (a fractured neck) and it will affect his future as a firefighter whether he undergoes treatment or not.
Overall there was a lot of drama and action this episode. The chief showed he will stand behind his men and we got to see the personal life of Peter Mills. Hope they will continue in this fashion.