CHICAGO FIRE — “Red Flag” Episode 12007 — Pictured: (l-r) Eamonn Walker as Chief Wallace Boden, Taylor Kinney as Kelly Severide — (Photo by: Adrian S Burrows Sr/NBC)

CHICAGO FIRE — “Red Flag” Episode 12007 — Pictured: (l-r) Hanako Greensmith as Violet Mikami, Miranda Rae Mayo as Stella Kidd — (Photo by: Adrian S Burrows Sr/NBC)

CHICAGO FIRE — “Red Flag” Episode 12007 — Pictured: Miranda Rae Mayo as Stella Kidd — (Photo by: Adrian S Burrows Sr/NBC)

CHICAGO FIRE — Episode 12007 — Pictured: Eamonn Walker as Chief Wallace Boden — (Photo by: Adrian S Burrows Sr/NBC)

CHICAGO FIRE — “Red Flag” Episode 12007 — Pictured: (l-r) Miranda Rae Mayo as Stella Kidd, Jake Lockett as Sam Carver — (Photo by: Adrian S Burrows Sr/NBC)

CHICAGO FIRE — Episode 12007 — Pictured: (l-r) Alessandra Villagómez as Maya, Taylor Kinney as Kelly Severide — (Photo by: Adrian S Burrows Sr/NBC)

CHICAGO FIRE — “Red Flag” Episode 12007 — Pictured: (l-r) Christian Stolte as Randy “Mouch” McHolland, Jake Lockett as Sam Carver, Miranda Rae Mayo as Stella Kidd, Taylor Kinney as Kelly Severide — (Photo by: Adrian S Burrows Sr/NBC)

CHICAGO FIRE — “Red Flag” Episode 12007 — Pictured: Taylor Kinney as Kelly Severide — (Photo by: Adrian S Burrows Sr/NBC)

CHICAGO FIRE — Episode 12007 — Pictured: (l-r) Jake Lockett as Sam Carver, Christian Stolte — (Photo by: Adrian S Burrows Sr/NBC)

CHICAGO FIRE — “Red Flag” Episode 12007 — Pictured: (l-r) Miranda Rae Mayo as Stella Kidd, Jake Lockett as Sam Carver– (Photo by: Adrian S Burrows Sr/NBC)

CHICAGO FIRE — Episode 12007 — Pictured: Hanako Greensmith as Violet Mikami — (Photo by: Adrian S Burrows Sr/NBC)

CHICAGO FIRE — “Red Flag” Episode 12007 — Pictured: (l-r) Jake Lockett as Sam Carver– (Photo by: Adrian S Burrows Sr/NBC)

Chicago Fire is produced by Universal Television, a division of Universal Studio Group, in association with Wolf Entertainment. Filmed at Cinespace Chicago Film Studio.