Chicago Fire - Season — 10

: Lieutenant Pelham (Brett Dalton) joins Firehouse 51 temporarily to fill the void left by Casey.

: The season opens with a gripping conclusion to the cliffhanger where Squad 3 was trapped underwater. New Characters and Cast Changes Chicago Fire - Season 10

: Kidd officially takes over as the Lieutenant of Truck 81 after passing her exams. : Lieutenant Pelham (Brett Dalton) joins Firehouse 51

: Captain Casey (Jesse Spencer) leaves for Oregon in the 200th episode to care for the Darden boys. marked by its 200th episode

Chicago Fire Season 10 is a milestone year for the series, marked by its 200th episode, a major cast departure, and high-stakes rescues. Key Storylines and Moments