Chicago Fire 6×22 “One for the Ages” & 6×23 “The Grand Gesture” Promo (Season Finale) – Boden takes a big step in the pursuit of a major career decision. Kidd becomes increasingly distrustful of Renee’s (guest star Sarah Shahi) motives with Severide. Herrmann has trouble bouncing back after a tragedy. Chicago Fire 6×23 “The Grand Gesture” (Season Finale) – Boden’s chances for a promotion are met with potential complications, leading him to take matters into his own hands. Dawson and Casey don’t see eye to eye on an important decision, while Kidd finds herself struggling to find time with Severide. Brett and Dawson respond to a tough call that quickly turns dangerous.