Who was behind a series of suspicious fires?
On Chicago Fire Season 9 Episode 10, lives were on the line when the gang investigated the mysterious fires plaguing the city.
Meanwhile, Mouch set out to make sure his long-awaited dream was in line to come true.
Elsewhere, Casey continued his way down a troubled path, leading to questions from his peers about his future.
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Paul Dailly is the Associate Editor for TV Fanatic. Follow him on Twitter.