On a call with Station 37, a firefighter is struck by a power line and decides to lash out after her injury.

Brett is visited by Scott and Amelia.

Violet gets a surprise envelope.

The rest of 51 enters a contest.

Air Date: Wednesday, Jan. 12 (09:00PM – 10:00PM) on NBC. 

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CHICAGO FIRE -- "Fog of War" Episode 1010 -- Pictured: (l-r) Kara Kilmer as Sylvie Brett, Miranda Rae Mayo as Stella Kidd, Hanako Greensmith as Violet -- (Photo by: Adrian Burrows Sr/NBC)