The Intelligence Unit has certainly evolved over the past decade.

Since Chicago Pd Season 1, we've had our fair share of characters come and go, losing beloved characters in any myriad of ways.

As we head into Chicago Pd Season 12, we can expect more changes regarding the Intelligence Unit as it continues to take new forms.

Chicago Pd Cast Slowly Evolves

For the most part, the fortunate aspect of Chicago Pd is that many of the original cast members still remain, even as we head into the twelfth season.

Of course, cast shifts due to budget restrictions have become common in many series, particularly those across the One Chicago franchise.

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From Chicago Med to Chicago Fire, we've seen an everchanging list of characters, and the cast rotates and takes new forms with new looks.