Article continues below advertisementChicago P.D. is facing significant cast changes as it gears up for Season 13, leaving fans eager to find out who will return. The One Chicago franchise, which includes Chicago Fire and Chicago Med, has built a reputation for compelling storylines and, unfortunately, frequent cast turnover.Article continues below advertisementNBC's president of program planning, Jeff Bader, reassured fans that cast changes are part of the business. "Cast comes in, cast goes out," Bader told TVLine in July 2024.