Warning: SPOILERS for 9-1-1 season 8, episode 15.9-1-1 season 8 has already made history by killing off its first main character, but Bobby’s death is made worse by the absence of one crucial member of LAFD station 118. Peter Krause’s shocking exit from 9-1-1 was the climactic ending to the procedural’s two-part thriller known as “Contagion” (due to the high-octane setting of a quarantined research lab housing a deadly pathogen). Out of all the intense disasters in 9-1-1, the lab explosion will be remembered as a series-defining emergency— but only time will tell if that’s for better or worse.