Did Mouch and Brett get caught working on their secret project?
That was a key question on Chicago Fire Season 5 Episode 4 when the pair tried their best to keep the lid on it.
Meanwhile on this addictive drama series, Casey had to spring into action when there was chemical spill while fulfilling his new duties.
Also, Dawson and Brett helped an elderly woman with a difficult senior advocate.
Use the video above to watch Chicago Fire online to get caught up with the latest developments for the characters.
Paul Dailly is a staff writer for TV Fanatic. Follow him on Twitter.