On Chicago PD Season 3 Episode 13, Lindsay goes undercover.
Her mission this week was to catch a police officer who was targeting women as they leave a local casino.
Elsewhere, Burgess planned to transfer districts, while Mouse offered to set Ruzek up with a friend.
That's never really a great idea, is it?
Also, Antonio volunteered to take Roman's place in a boxing match against Jimmy from Firehouse 51.
Who came out on top in this battle?
Click on the video above to watch Chicago PD online and find out for yourself now.