Family First! A Guide to How ‘Chicago Fire,’ ‘Chicago P.D.’ and ‘Chicago Med’ Characters Are Related

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Family First! A Guide to How ‘Chicago Fire,’ ‘Chicago P.D.’ and ‘Chicago Med’ Characters Are Related

A tangled web we weave! Dick Wolf’s characters on Chicago Fire, Chicago P.D. and Chicago Med are intertwined on a variety of levels, including siblings, marriages and failed romances. Fans got a taste for the crossover connections early on with Chicago Fire’s Gabby Dawson (Monica Raymund) and Chicago P.D.’s Antonio Dawson (Jon Seda). The fictional sister and brother duo first appeared on screen together during season 1 of Fire, which is the first One Chicago series from Wolf. (The show debuted in October 2012.) “When they first offered me the role, Dick Wolf said he was the brother to Gabriela Dawson and he is a detective,” Seda recalled during an interview with Starry magazine in October 2017. “So, I think it was pretty much left open for me to bring to it whatever I was going to bring to Antonio. Of course, now, how they write him in the scripts …That’s pretty much it — he’s the brother of Gabby and he’s a detective.” The LA Brea star, who was part of the original cast of Chicago P.D. when it premiered in January 2014, noted that his chemistry with Raymund happened quickly. “We didn’t really have time to rehearse and get to know each other,” Seda explained. “She’s just such a pro and such a great person that she makes it so easy for me to walk on set and see her and work with her. She’s just so good and she’s a joy to work with.” Not long after viewers were introduced to Chicago P.D.’s Jay Halstead (Jesse Lee Soffer) during the procedural drama’s first season, they learned that he had an equally talented brother, Dr. Will Halstead (Nick Gehlfuss), who later became a lead character on Chicago Med. [jwplayer 0bURCXa0-zhNYySv2] Off screen, the actors’ bond goes beyond just being friends — they have experience saving a person’s life together. "My favorite fan story is actually, like, a real-life rescue encounter,” Soffer told reporters at Comic Con in July 2021, recalling a time when the duo helped rescue a woman who was in a car crash. “I was out to dinner with Nick Gehlfuss, who plays my brother on Chicago Med, and we were walking home from dinner and we heard screeching tires behind us, like, a block away.” The Mob Doctor alum revealed that the woman’s vehicle had rolled into a ditch after hitting another car. "Nick and I, we ran, and he was like, ‘What are we doing?’ And I was like, ‘We go, we have to go.’ And we sprang into action,” Soffer continued. "We jumped into the ditch and we pulled this woman out. The car was on its side, we pulled her out of the driver’s side window, basically, and got her up.” The In Time actor noted that the woman was surprised to see both actors, who play Chicago first responders, on the scene of the accident. “She was like ‘Aaah!’ It was, like, a weird meta experience for her that the Halstead brothers were saving her life,” Soffer added. Scroll down to see how some of the other One Chicago characters are related — and which crossovers led to romances:

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Gabby Dawson and Antonio Dawson

Fans were introduced to both Gabby (Raymund) and Antonio (Seda) on Chicago Fire. Paramedic-turned-firefighter Gabby was a main character on Fire for six seasons before her 2018 exit. Her TV brother, for his part, had multiple appearances on Fire before becoming a lead character on Chicago P.D. from 2014 to 2019. He was also a fixture on Chicago Justice, which lasted one season.

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Jay Halstead and Will Halstead

The Halstead brothers frequently crossed paths on Chicago P.D. and Chicago Med. Jay (Soffer) has been part of P.D.’s Intelligence Unit since the show’s 2014 premiere. Viewers were later introduced to his sibling Will (Gehlfuss) on Med, which premiered in 2015.

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April Sexton and Noah Sexton

This fictional sibling duo had the rare opportunity to star on the same series. April (Yaya DaCosta) was a staple on Chicago Med from 2015 to 2021. Her brother, Noah (Roland Buck III), made his first appearance during season 1 of the show. He later joined the hospital as a resident, but his time came to an end during season 6 in 2021 after allowing a patient to take their own life.

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Randall 'Mouch' McHolland and Trudy Platt

These two beloved characters are related by marriage. Firefighter Mouch (Christian Stolte) has been part of Truck 81 on Chicago Fire since the show’s start, while Detective Trudy Platt (Amy Morton) has been running the front desk on Chicago P.D. since its premiere. The couple’s paths didn’t cross until season 2 of Fire when they both attended Chief Boden’s (Eamonn Walker) wedding. They tied the knot two seasons later during 2016’s “On the Warpath” episode.

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Jay Halstead and Hailey Upton

Jay has a history of dating his Chicago P.D. partners, including his longtime romance with Sophia Bush’s Erin Lindsay ahead of her season 4 exit in 2017. While Jay was single for a while after the split, he later fell for Upton (Tracy Spiridakos), who joined the series at the end of season 4. The twosome became an item during season 8, and secretly tied the knot one season later.

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Stella Kidd and Kelly Severide

After dating multiple One Chicago ladies — many more just on Chicago Fire — Lieutenant Kelly Severide (Taylor Kinney) found his forever love in Lieutenant Stella Kidd (Miranda Rae Mayo). The duo started dating during season 6 of Chicago Fire, two seasons after Kidd transferred to Firehouse 51. Severide proposed during season 9 and despite a few wedding day setbacks, the twosome got hitched during the season 10 finale in May 2022.

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Antonio Dawson and Sylvie Brett

In addition to being Gabby’s older brother, Chicago P.D.'s Antonio (Seda) was romantically linked to Chicago Fire’s Sylvie Brett (Kara Killmer) during season 5 of the series. The duo’s ups and downs included a pregnancy scare, meeting Antonio’s kids and Gabby's mixed feelings about the pairing. They called it quits later that season.

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Kelly Severide and Erin Lindsay

Lieutenant Severide (Kinney) has dated a lot of women on Chicago Fire, many of which were only featured on his show. His crossover romances, however, are equally as noteworthy, including his hookup with Chicago P.D.’s Detective Erin Lindsay (Bush). The duo were briefly an item during seasons 2 and 3 of Fire before their fling crossed over on season 1 of P.D. While Severide is still a lead character on Fire, Bush exited the police drama in 2017 after four seasons.

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Kelly Severide and April Sexton

During season 3 of Chicago Fire, fans were introduced to April (DaCosta) as a childhood friend and love interest of Severide (Kinney). The chemistry between the two was undeniable, but they only kissed before deciding they were better as friends. April later found her footing as part of the medical team on Chicago Med from 2015 to 2021.

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Kelly Severide and Anna Turner

Chicago Fire’s lead daredevil Kelly Severide (Kinney) fell for Dr. Anna Turner (Charlotte Sullivan), who worked at Chicago Med but was never technically on the medical drama. Her work as a pediatric doctor was talked about, however, on Fire during season 5. The couple were together until Anna died of leukemia after Severide had donated bone marrow in hopes of saving her life.