CHICAGO FIRE -- "Change of Plans" Episode 1121 -- Pictured: (l-r) Miranda Rae Mayo as Stella Kidd, Joe Minoso as Cruz.

CHICAGO FIRE -- "Change of Plans" Episode 1121 -- Pictured: Anthony Ferraris as Tony

CHICAGO FIRE -- "Change of Plans" Episode 1121 -- Pictured: (l-r) Ava Ryan Barabasz as Charlotte, Hanako Greensmith as Violet, Kara Killmer as Sylvie Brett.

Spoilers Collage for Chicago Fire Season 11 Episode 20.

CHICAGO FIRE -- "Never, Ever Make a Mistake" Episode 1120 -- Pictured: Daniel Kyri as Darren Ritter.

CHICAGO FIRE -- "Never, Ever Make a Mistake" Episode 1120 -- Pictured: (l-r) Eric Peterson as Shep, Miranda Rae Mayo as Stella Kidd, Alberto Rosende as Blake Gallo, Christian Stolte as Randy “Mouch” McHolland, Jake Lockett as Carver.

CHICAGO FIRE -- "Never, Ever Make a Mistake" Episode 1120 -- Pictured: (l-r) Alberto Rosende as Blake Gallo, Eric Peterson as Shep, Miranda Rae Mayo as Stella Kidd, Kara Killmer as Sylvie Brett.

CHICAGO FIRE -- "Never, Ever Make a Mistake" Episode 1120 -- Pictured: Jake Lockett as Carver.

CHICAGO FIRE -- "Never, Ever Make a Mistake" Episode 1120 -- Pictured: (l-r) Alberto Rosende as Blake Gallo, Miranda Rae Mayo as Stella Kidd, Jake Lockett as Carver.

CHICAGO FIRE -- "Never, Ever Make a Mistake" Episode 1120 -- Pictured: Eric Peterson as Shep.

CHICAGO FIRE -- "Never, Ever Make a Mistake" Episode 1120 -- Pictured: (l-r) Eric Peterson as Shep, Miranda Rae Mayo as Stella Kidd.

CHICAGO FIRE -- "Never, Ever Make a Mistake" Episode 1120 -- Pictured: Daniel Kyri as Darren Ritter.