Why did Peter Krause leave 9-1-1? The real reason behind Bobby Nash’s season 8 exit

Peter Krause has officially exited 9-1-1, leaving fans emotional after his character, Bobby Nash, made a heroic sacrifice in season 8, episode 15.

In a tragic twist, Bobby died after exposing himself to a deadly virus to save his team, including firefighter Chimney, during a high-stakes rescue inside a hazardous bio lab.

In the episode, Bobby revealed to Buck (Oliver Stark) that his breathing equipment was compromised and chose to remain behind, ensuring his team's survival. His emotional farewell to wife Athena (Angela Bassett) was a highlight of the episode, as he told her, “I chose to save my team because it was the right thing to do... I don’t want to go.”

Following the episode, Krause addressed his departure in an interview on Good Morning America. He reflected on his eight-year journey with the series, saying, “This was my workplace home for eight years, and I am really going to miss everybody.” He also praised the love story between Bobby and Athena, expressing a desire to portray another relationship as meaningful in future roles.

Co-creator Tim Minear spoke with Variety about the creative decision, explaining, “If we have any hope of creating stories going forward that have actual stakes, then someone’s got to die. It needed to be Bobby.” He hinted, however, that Bobby may appear again this season, confirming that episode 15 is not Krause’s final appearance.

The May 1 episode, titled “The Last Alarm,” will follow the aftermath of Bobby’s death as the team processes the loss of their leader, leaving fans to wonder how his legacy will continue to shape the show’s future.