How did everyone feel about the FBI taking over Firehouse 51?
That was revealed on Chicago Fire Season 6 Episode 18 when an undercover operation meant taking over the firehouse was a necessity.
Meanwhile, two members of the team offered up their services to help in the investigation.
Also, Kidd attempted to get Severide to come to terms with recent big changes in his life, but did a blast from the past derail everything?
Use the video above to watch Chicago Fire online right here via TV Fanatic.
Get caught up on all the latest twists and turns right now.
Paul Dailly is the Associate Editor for TV Fanatic. Follow him on Twitter.