'9-1-1' Season 2 Trailer Introduces Jennifer Love Hewitt's Character and Teases Wild Emergency Calls

Meet the newest cast members and get a look at some of the crazy emergency calls coming for the first responders in the new 9-1-1 Season 2 trailer Fox released Thursday.

"In the second season, we're expanding our 911 call-center group," creator Ryan Murphy told TVLine in March, ahead of the Season 1 finale. Fox renewed the series in January.

"With a bold concept, award-winning stars and a flawless execution, [creators] Ryan, Brad [Falchuk] and Tim [Minear] have done it again," Fox chairmen and CEOs Gary Newman and Dana Walden said in a press release at the time. "They have tapped into the cultural zeitgeist and reimagined the procedural as only they could. … This is storytelling at its best."

Connie Britton will not be reprising her role of 911 operator Abby Clark, though Murphy had hoped to bring her back in a guest-star capacity, TVLine reported Thursday.

Helping fill the 911 operator role is Jennifer Love Hewitt (Criminal Minds) as Maddie. "She has had a little bit of a tough time in her life, in sort of an abusive relationship. She comes to her brother [firefighter Buck, played by Oliver Stark] pretty broken and bothered by what's kind of happening in her life, and needing to start over," the actress detailed, according to TheWrap Thursday. "She was a nurse before, and sort of through his guidance and brilliance becomes a 911 operator and is able to help people but stay in the same place, given her situation."

Another new cast member is Ryan Guzman (Heroes Reborn), playing a new firefighter in Bobby's (Peter Krause) firehouse, TVLine announced in May. He's "been through a lot, but he also takes on a lot," the actor said via TheWrap. "He's all about the job itself. So he's a very easy person to like, and there is not too much of him trying to get people to like him."

9-1-1 Season 1 had a few crazy emergency calls, and that will continue in the fall, as teased in the trailer above and video below. The first responders will be retrieving body parts and dealing with an earthquake and a helicopter crash. The new footage also offers a look at what's coming up in Bobby's romance with police officer Athena (Angela Bassett), and introduces new cast members Guzman and Hewitt.

The two-night 9-1-1 Season 2 premiere is Sunday, September 23, following the NFL doubleheader. The second part airs in the series' regular time slot, Monday, September 24, at 9 p.m. ET on Fox.