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Continue to ChatMy character started off on 'Chicago P.D.' as the brother to Detective Jake Halstead, and then I also played on 'Chicago Fire.' So, I really worked on both shows before 'Chicago Med' even started. - Nick Gehlfuss from https://whatsmyquote.com/quote/my-character-started-off-on-chicago-p-d-as-the-brother-to-detective-jake-halstead-and-then-i-also-played-on