She has been to the firehouse twice, and was the ex-girlfriend of Otis - having shown romantic feelings towards him when she came to the firehouse. They ended up kissing and playing Catan together. Katie Nolan is the half sister of Kelly Severide and daughter of Benny Severide. Katie is a chef who took the offer from her boss to help set up another restaurant in New York, after she was kidnapped.

The Chicago franchise (also called One Chicago) is a media franchise of American television programs created by Derek Haas, Michael Brandt and Dick Wolf, and broadcast on NBC, all of which deal with different public services in Chicago, Illinois.. As of April 15, 2020, 443 episodes of the Chicago …