Warning: This article contains major spoilers for 9-1-1’s April 17 episode “Lab Rats.”

It’s time for one character to hang up their uniform.

After eight seasons as 9-1-1’s leading man, Peter Krause’s character Captain Bobby Nash was killed off during the procedural series’ April 17 episode in a shocking twist to fans.

In the latest episode of the ABC show, Nash became infected with a deadly virus and, in the end, sacrificed his life by giving the only vial of vaccine available to Kenneth Choi’s character Chimney. In the fire captain’s final moments before his death, he shared an emotional goodbye with his wife, police sergeant Athena Grant-Nash (Angela Bassett).

Following the episode, Krause responded to fans’ shock and heartbreak over his character’s tragic end.

“I’ve heard that many fans are upset by this loss and they have a right to be. It is a loss,” he told Variety in a statement published April 17. “That said, it was more than a bold creative choice on a bold show. Bobby Nash was written in sacrifice and he was built for this.”