Did Severide catch the culprit?
On Chicago Fire Season 8 Episode 18, the firefighter teamed up with Seager and the OFI when a motel structure fire turned suspicious.
Meanwhile, Firehouse 51 members became amateur sleuths following a Reddit post involving one of their own.
What did they find out?
Elsewhere, Brett continued to get invested in her birth mother, Julie.
What was she hiding?
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Paul Dailly is the Associate Editor for TV Fanatic. Follow him on Twitter.