Chicago Fire left viewers reeling when the NBC drama wrapped its fifth season in May.
In the final moments of the episode, Casey (Jesse Spencer) and Mouch (Christian Stolte) both found themselves trapped inside a building during a dangerous fire. As Herrmann (David Eigenberg) desperately tried to help Mouch out of the building after the latter collapsed, Meanwhile, Casey radioed his wife Dawson (Monica Raymund) to tell how much he loved her. "You're the best thing that's ever happened to me," he said. The episode ended leaving much of the team's fates in question.
While it was an emotional episode to be sure, Fire and the rest of Dick Wolf's Chicago franchise are already very well acquainted with the grim reaper. Ever since the pilot episode of the flagship series, which opened with the death of Casey and Severide's longtime friend and colleague Andy Darden, the trio of Windy City-set procedurals have never shied away from showing the sometimes deadly consequences of their dangerous professions.
THR looks back at the nine biggest deaths in franchise history (so far).