Chicago Fire

CHICAGO FIRE -- "The F is For" Episode 612 -- Pictured: Monica Raymund as Gabriela Dawson -- (Photo by: Elizabeth Morris/NBC)

CHICAGO FIRE -- "The F is For" Episode 612 -- Pictured: (l-r) Jesse Spencer as Matthew Casey, Monica Raymund as Gabriela Dawson -- (Photo by: Elizabeth Morris/NBC)

CHICAGO FIRE -- "The F is For" Episode 612 -- Pictured: Eamonn Walker as Wallace Boden -- (Photo by: Elizabeth Morris/NBC)

CHICAGO FIRE -- "The F is For" Episode 612 -- Pictured: (l-r) Christian Stolte as Mouch, Taylor Kinney as Kelly Severide, Joe Minoso as Joe Cruz, Miranda Rae Mayo as Stella Kidd -- (Photo by: Elizabeth Morris/NBC)

CHICAGO FIRE -- "The F is For" Episode 612 -- Pictured: (l-r) Miranda Rae Mayo as Stella Kidd, Daniel Di Tomasso as Zach Torbett -- (Photo by: Elizabeth Morris/NBC)

CHICAGO FIRE -- "The F is For" Episode 612 -- Pictured: (l-r) Taylor Kinney as Kelly Severide, Miranda Rae Mayo as Stella Kidd -- (Photo by: Elizabeth Morris/NBC)

CHICAGO FIRE -- "The F is For" Episode 612 -- Pictured: (l-r) Taylor Kinney as Kelly Severide, Miranda Rae Mayo as Stella Kidd -- (Photo by: Elizabeth Morris/NBC)

CHICAGO FIRE -- "The F is For" Episode 612 -- Pictured: Jesse Spencer as Matthew Casey -- (Photo by: Elizabeth Morris/NBC)

CHICAGO FIRE -- "The F is For" Episode 612 -- Pictured: (l-r) Taylor Kinney as Kelly Severide, Jesse Spencer as Matthew Casey -- (Photo by: Elizabeth Morris/NBC)

CHICAGO FIRE -- "The F is For" Episode 612 -- Pictured: (l-r) Taylor Kinney as Kelly Severide, Miranda Rae Mayo as Stella Kidd -- (Photo by: Elizabeth Morris/NBC)

CHICAGO FIRE -- "The F is For" Episode 612 -- Pictured: Taylor Kinney as Kelly Severide -- (Photo by: Elizabeth Morris/NBC)

CHICAGO FIRE -- "The F is For" Episode 612 -- Pictured: Miranda Rae Mayo as Stella Kidd -- (Photo by: Elizabeth Morris/NBC)

CHICAGO FIRE -- "The F is For" Episode 612 -- Pictured: (l-r) Christian Stolte as Mouch, Yuri Sardarov as Otis, Kara Killmer as Sylvie Brett -- (Photo by: Elizabeth Morris/NBC)

CHICAGO FIRE -- "The F is For" Episode 612 -- Pictured: Kara Killmer as Sylvie Brett -- (Photo by: Elizabeth Morris/NBC)

CHICAGO FIRE -- "The F is For" Episode 612 -- Pictured: David Eigenberg as Christopher Herrmann -- (Photo by: Elizabeth Morris/NBC)

CHICAGO FIRE -- "The F is For" Episode 612 -- Pictured: (l-r) Christian Stolte as Mouch, Yuri Sardarov as Otis -- (Photo by: Elizabeth Morris/NBC)