Oliver Stark is opening up about what lies ahead for his character, Evan "Buck" Buckley, on this season of 9-1-1 - from adjusting to new partnerships at work to delving deeper into what it means to be a bisexual man. The season 9 premiere, which aired on ABC Thursday, October 9, showed Buck struggling with Eddie's (Ryan Guzman) new role as a paramedic alongside Hen (Aisha Hinds). The shift occurred following the death of Captain Bobby Nash (Peter Krause) at the end of season 8, leaving paramedic Chimney (Kenneth Choi) to step into the new role of interim captain.