Jeff Lima

The crew of Firehouse 51 are full of festive cheer until Casey is accused of stealing a diamond necklace. Meanwhile, sparks fly between Shay and Severide.

Casey's conscience gets put through the wringer when he visits his mother in prison. Cruz shares a secret, and Pete fills in for Shay in the ambulance crew.

Severide is made an enticing offer by a woman he saved from a car crash and the crew bid farewell to a colleague after a blaze at a garage.

Severide finally addresses Chief Boden about his injury and makes some important personal decisions about his future. Meanwhile, Casey struggles with family matters and Dawson takes matters into her own hands.

The Firehouse 51 crew has a Thanksgiving to remember when drugs, a car accident, and a gang shooting get in the way of traditional holiday pastimes.

Tension builds when a group of rabble-rousers attempts to lock down the firehouse. Brett is faced with a monumental decision and Cruz readies himself for a big day. Gallo and Ritter attempt to launch Firehouse 51 into the social media age.