Here are some"One Chicago" charactersthat you likely have seen in other shows.
The franchise’s setup makes it easy for crossovers to happen through connections between characters.
In fact, some characters from separate shows are biologically related, perFanSided.

For example, Dr. Will Halstead of “Chicago Med” is brother to “Chicago P.D.”
star Hank Voight, played by Jason Beghe.
Voight has since returned to the series that gave him his start.

Unfortunately, the two weren’t meant to be.
“They’re 1,500 miles away,” SVU executive producer Warren Leight told EW.
I wasn’t sure how often they could get together for Passover Seder or something.

I didn’t understand how it would work logistically, and I think politically there was distance between them.
There’s enough coupling up on [‘Chicago P.D.']
without me loaning one of my few officers."

star Antonio Dawson, played by Jon Seda.
He comes to see his sister while their father Ramon is in the hospital, perTV Guide.
The familial connections within the universe make for plenty of heartfelt moments.

“Antonio is a guy who likes to do things by the book.
He’s hard-working and loves being a Chicago cop … “Part of it will also be his family, his status as a single parent will factor in.
Erin Lindsay (Sophia Bush)
“Chicago P.D.
“’s Erin Lindsay, played by Sophia Bush, also gets some fun crossover action.
precinct work together to rescue Lindsay’s protege Nadia from the nefarious grips of Gregory Yates.
Along with this bit of crossover, Lindsay is also involved with “Chicago Fire” heartthrob Kelly Severide.
Their relationship makes for some steamy moments between the two shows.
Kelly Severide (Taylor Kinney)
Speaking of"Chicago P.D.
Much of his movement between shows comes from his various romances.
As mentioned earlier, he finds love with Erin Lindsay.
Clearly, some characters call for more crossover content than others, but fans clearly can’t get enough.