A tornado threatens Chicago. Chili makes a major mistake, which causes Brett to report her to Boden. Otis asks Dawson to help him solve his women troubles. Severide assists a Department of Homeland Security agent.

Barbara Zahora, Jaslene Gonzalez, Jon Seda, Liza J. Bennett, Lucas Jade Zumann, Mia Park, Ralph Rodriguez, Robyn Coffin