The 5 most painful One Chicago breakups

4. Brett and Antonio, Chicago Fire and Chicago PD

Sylvie Brett (Kara Killmer) and Antonio Dawson (Jon Seda) were one of One Chicago’s rare couples to cross between shows. We didn’t see Chicago Fire‘s paramedic and Chicago PD‘s fan favorite as a ship at first, but One Chicago fans quickly warmed to what was dubbed “Brettonio.”

There was something about Brett’s wide-eyed optimism and high energy that provided a welcome respite for Antonio, whose marriage imploded pretty early on in Chicago PD canon in another case of a previously strong relationship going sour quickly. Which is ironic, because Antonio’s ex-wife Laura Dawson (America Olivo) would also play a big role in the destruction of his relationship with Brett.

In Chicago Fire season 5, Brett made an effort to befriend Antonio’s son Diego—which did not sit well with Laura. She told off Brett, and when Antonio found out, it somehow started a fight that we still don’t understand and which ended with the two calling time on their relationship.

Then this season, it only got worse as they got back together, then didn’t, then did, then might’ve had a baby, then didn’t. Along the way, Brett fell over herself trying to hit on a Hazmat officer and Antonio slept with someone else. That’s what lands Brettonio’s breakup on our list.

It was painful for both Brett and Antonio, but it was equally painful for One Chicago viewers, who had to deal with a first bust-up that didn’t make sense followed by a half-season’s worth of being pulled back and forth. At this point, it feels like we’re in a bad relationship with this relationship.