Chicago P.D. sent a stuntwoman into the freezing Chicago river for the midseason premiere

Variety

In next week's episode, Tracy Spiridakos' character jumps in the river to make a rescue. But she actually jumped into a heated tank in Los Angeles. The job of actually jumping in the freezing Chicago river fell to stuntwoman Kelli Scarangello, who called it a dream come true. “It’s kind of a running joke here in Chicago that you’re not on official midwest stunt person until you go in the Chicago river — so I was excited,” she tells Variety.