Gallo clashes with the new lieutenant temporarily filling in for Casey.

Severide closes in on a dangerous and deadly arsonist. 

Air Date: Wednesday, Nov. 3 (09:00PM – 10:00PM) on NBC. 

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CHICAGO FIRE -- "Whom Shall I Fear" Episode 1007 -- Pictured: (l-r) Andy Allo as Seager, Taylor Kinney as Kelly Severide -- (Photo by: Adrian Burros Sr/NBC)

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