Watch Chicago Fire Season 7 Episode 21 online via TV Fanatic with over 6 options to watch the Chicago Fire S7E21 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, Hulu Plus, NBC, and Yahoo View.
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On Chicago Fire Season 7 Episode 21, a serial arsonist cold case ends up being reopened when Lt. Severide finds a connection to a recent salon fire.