Complete cast breakdown of 9-1-1 season 9: Who plays Who & where you’ve seen them before

9-1-1 Season 9 is about Los Angeles' first responders as they face dangers in the city and space. The ninth season of this ABC series premiered on Thursday, October 9, 2025.

The third episode, The Sky Is Falling, begins with Athena and Hen's Inaraspacecraft aflame. The fire is extinguished by Athena. However, the emergency hatch fails. The crew had no oxygen or escape.As first responders face challenges, 9-1-1 season 9 has delivered thrilling drama and emotional twists. Episode 3 begins after Athena (Angela Bassett) and Hen (Aisha Hinds)'s Inara spacecraft caught fire.

Tripp Houser (Mark Consuelos) is indifferent, but Karen (Tracie Thoms) and Maddie (Jennifer Love Hewitt) save Earth. Inara contact is relentlessly pursued. Since the spacecraft cannot return to Earth, Karen suggests leading them to the ISS. Astronauts reach the ISS after intense teamwork, but a space debris field threatens them.

9-1-1 Season 9 main cast members: Exploring the main characters in this new season

Aisha Hinds plays Henrietta "Hen" Wilson

Aisha Hinds portrays Henrietta “Hen” Wilson, a firefighter and paramedic. Hen struggles with personal issues like her marriage to Karen and her career. 

Hinds has appeared in True Blood, Detroit 1-8-7, and Underground (2016), playing Harriet Tubman. She was lauded for her roles in Shots Fired (2017) and All the Way (2016).

Angela Bassett plays Athena Grant

Bassett's LAPD patrol sergeant, Athena Grant, is back with her compassion. Athena is known for her calmness in emergencies, but this season, she must cope with the loss of her husband, Bobby.

Bassett's career took a turn in 1993 with a Golden Globe-winning role as Tina Turner in What's Love Got to Do with It. She appeared in Malcolm X (1992), Waiting to Exhale (1995), and Black Panther (2018). 

Oliver Stark plays Evan "Buck" Buckley

As LAFD firefighter Evan “Buck” Buckley, Oliver Stark struggles with his personal life and high-risk firefighting in 9-1-1 season 9.

Stark got his fame after playing Evan "Buck" Buckley in 9-1-1. His first professional role was in the 2011 short film Follow. The 2015 AMC drama Into the Badlands made Stark famous as Ryder. He made guest appearances in Underworld: Blood Wars (2016) and Luther, as well as Casualty.

Ryan Guzman as Eddie Diaz

Ryan plays Edmundo “Eddie” Diaz, a dedicated firefighter and family man. In 9-1-1 season 9, Eddie balances his life-threatening job with being a single father. His closeness to coworkers gives the series emotional depth.

In Step Up Revolution (2012) and All In (2014), Guzman had his break. He and Jennifer Lopez starred in the 2015 psychological thriller The Boy Next Door. With 9-1-1, Guzman moved to television and established his career in action and drama.

Kenneth Choi plays Howard "Chimney" Han

Kenneth Choi portrays firefighter and paramedic Howard “Chimney” Han. As he struggles with Maddie and work, Chimney matures. Choi appeared in The Wolf of Wall Street (2013) and Sons of Anarchy (2008–2014). Jim Morita in Captain America: The First Avenger (2011) and Principal Morita in Spider-Man: Homecoming (2017) are among his popular performances.

Other cast members of 9-1-1 season 9

• Gavin McHugh as Christopher Diaz
• Jennifer Love Hewitt as Maddie Buckley
• Anirudh Pisharody as Ravi Panikkar
• Tracie Thoms as Karen Wilson
• Debra Christofferson as Sue Blevins
• Mark Consuelos as Tripp Hauser
• Bailey and Hailey Leung as Jee-Yun Buckley Han
• Chiquita Fuller as Linda Bates
• Declan Pratt as Denny Wilson
• Askyler Bell as Mara Wilson
• Claudia Christian as Captain Elaine Maynard
• Alex Loynaz as Terry Flores
• Bryan Safi as Josh Russo

9-1-1 season 9 episodes are available to stream on ABC.