A frustrated Severide, turns to an unlikely ally to resolve his current dilemma. Casey begins to find satisfaction in his personal life, while Mills and Dawson face personal challenges. Meanwhile, the squad is called to the scene of a harrowing apart... (more)ment building collapse.

Brooke Nevin, Christian Stolte, Christopher Cousins, Joe Miñoso, Jon Seda, Scott Eastwood, Tania Raymonde, Teri Reeves, Yuri Sardarov