After a front-running female presidential candidate, Valerie Caldwell, is targeted with a car bomb, OA and Maggie must hurry to track down the bomber before they strike again. The case…

Chuck’s probe is derailed temporarily; Axe makes an aggressive move.

Axe deals with a betrayal. Chuck learns the inner workings of Axe Capital.

An unexpected visit throws Casey for a loop. Severide sets out to exonerate a wrongly convicted arsonist. Kidd pays the price for burning the candle at both ends. Cruz goes…