Griffin learns the truth about his father’s death and reveals why he really came to visit Casey.

Gallo, Ritter and Violet take steps to expand their microbrewery business.

Air Date: Wednesday, Oct. 6 (09:00PM – 10:00PM) on NBC.

NUP_195001_00527.JPG

Picture 6 of 8

CHICAGO FIRE -- "Counting Your Breaths" Episode 1003 -- Pictured: Taylor Kinney as Kelly Severide -- (Photo by: Adrian S. Burrows Sr./NBC)