Was a copycat arsonist trying to take down the people of Chicago?
On Chicago Fire Season 7 Episode 21, Severide reopened a cold case when he found a connection to a recent salon fire.
With the original arsonist not being found, it was up to Severide and a team of his choosing to find the culprit before the body count continued to rise.
Who was the arsonist?
Meanwhile, Firehouse 51 celebrated a retirement party.
Who bid farewell to the workplace?
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Paul Dailly is the Associate Editor for TV Fanatic. Follow him on Twitter.