

Gavin McHugh, who plays Eddie's son Christopher, was promoted to a series regular in season 3, after recurring in season 2. On June 4, 2018, it was announced that Corinne Massiah and Marcanthonnee Jon Reis, who play May and Harry Grant, had been promoted, from their recurring roles in season 1, to series regulars for season 2. On May 23, 2018, Fox announced that Ryan Guzman would be joining the second season of the series as new firefighter Eddie Díaz. On May 14, 2018, it was announced that Jennifer Love Hewitt would join the main cast as Maddie Buckley, Buck's sister, in season 2, replacing the role of Britton's character Abby Clark.

Later that month, it was announced that Oliver Stark, Aisha Hinds, Kenneth Choi, and Rockmond Dunbar had been cast in regular roles. In October 2017, Connie Britton, Angela Bassett, and Peter Krause joined the main cast. On May 16, 2022, Fox renewed the series for a sixth season which is scheduled to premiere on September 19, 2022. On May 17, 2021, Fox renewed the series for a fifth season which premiered on September 20, 2021. On April 13, 2020, Fox renewed the series for a fourth season which premiered on January 18, 2021. On March 25, 2019, Fox renewed the series for a third season which premiered on September 23, 2019. EDT time slot on Monday, September 24, 2018. EDT the second episode aired in the series's regular 9 p.m.

The second season premiered with a special episode on Sunday, September 23, 2018, at 8 p.m. On January 16, 2018, Fox renewed the series for an eighteen-episode second season. Minear also serves as showrunner and Buecker directed the premiere episode. The series is produced by 20th Television (formerly 20th Century Fox Television), with Murphy, Falchuk, Minear, and Bradley Buecker as executive producers along with cast members Angela Bassett and Peter Krause. Main article: List of 9-1-1 episodes Season John Harlan Kim as Albert Han, Chimney’s half-brother (season 4 recurring seasons 3, 5).Gavin McHugh as Christopher Díaz, Eddie's son (season 3-present recurring season 2).Marcanthonee Jon Reis as Harry Grant, Athena and Michael's son, Bobby's stepson (season 2-present recurring season 1).Corinne Massiah as May Grant, Athena and Michael's daughter, Bobby's stepdaughter (season 2–present recurring season 1).Ryan Guzman as Edmundo "Eddie" Díaz, firefighter and paramedic (season 2–present).She comes to Los Angeles and becomes a 911 operator (season 2–present) Jennifer Love Hewitt as Maddie Buckley (formerly Kendall), Buck's sister, and a trained nurse.Connie Britton as Abigail "Abby" Clark, 911 operator (season 1 special guest season 3).Rockmond Dunbar as Michael Grant, Athena's ex-husband (seasons 1–5).Kenneth Choi as Howard "Howie"/"Chimney" Han, firefighter and paramedic.Aisha Hinds as Henrietta "Hen" Wilson, firefighter and paramedic.Oliver Stark as Evan "Buck" Buckley, firefighter, Maddie's brother.Peter Krause as Robert "Bobby" Nash, LAFD Station 118 captain, Athena's husband.Angela Bassett as Athena Grant-Nash (née Carter), LAPD patrol sergeant, Bobby's wife.In May 2022, the series was renewed for a sixth season which is set to premiere on September 19, 2022. In May 2021, the series was renewed for a fifth season which premiered on September 20, 2021. In April 2020, Fox renewed the series for a fourth season, which premiered on January 18, 2021. In March 2019, Fox renewed the series for a third season, which premiered on September 23, 2019. 9-1-1 is a joint production between Reamworks, Brad Falchuk Teley-Vision and Ryan Murphy Television in association with 20th Television. The series stars Angela Bassett, Peter Krause, Oliver Stark, Aisha Hinds, Kenneth Choi, Rockmond Dunbar, Connie Britton, Jennifer Love Hewitt, Ryan Guzman, Corinne Massiah, Marcanthonee Jon Reis, Gavin McHugh, and John Harlan Kim. The series follows the lives of Los Angeles first responders: police officers, paramedics, firefighters, and dispatchers. 9-1-1 is an American procedural television series created by Ryan Murphy, Brad Falchuk, and Tim Minear for the Fox Broadcasting Company.
