If you’ve been keeping track, this means that the Chicago Fire couple to end all Chicago Fire couples only had about a season and a half of wedded bliss until Dawson decided to decamp for work in Puerto Rico, spurred on by actress Monica Raymund’s choice to leave the series.
The Season 3 finale, however, reveals that Dawson is pregnant, but the following season isn’t any kinder to the couple, as she loses the baby soon after.
Eventually, finally, Dawson and Casey get hitched during Season 5.
But, by midseason, the loss has brought them back together, and they are engaged again, only to go through another series of trials when Dawson decides to foster a young boy who lost his mother in a fire they worked on.