September has been a busy month for Netflix, with new seasons, international dramas, crime thrillers and fresh teen stories arriving throughout the month. From the return of The Gentlemen and Fauda to Indian mystery thriller Shaque: Trust No One and the latest Monster anthology, there is plenty to add to your watchlist.

If you’re searching for Netflix new series September 2026, this month’s lineup covers everything from psychological mysteries and crime dramas to romance, action and coming-of-age stories.

A few titles on this list actually premiered in late August but continued to be available or release episodes during September, so we’ve included those separately rather than presenting incorrect September premiere dates.

Here’s the complete breakdown.

1. Mousetrap: Limited Series

Release Date: August 28, 2026
Type: Limited Series
Episodes: 10
Runtime: Around 1 hour per episode
Genre: Crime, Drama, Mystery, Thriller
IMDb: 6.9/10
Director: Kim Hong-sun
Creator/Writer: Lee Jae-gon
Cast: Ryu Jun-yeol, Sul Kyung-gu, Lee Kyoo-hyung, Hyun Bong-sik

About Mousetrap

A reclusive novelist wakes up to discover that someone has stolen his identity. His search for answers brings him into an uneasy alliance with a ruthless loan shark, while a mysterious figure known as “The Rat” remains at the centre of the danger.

Mousetrap is based on the webtoon Field Mouse and combines identity theft, crime and psychological mystery. It premiered on Netflix in India on August 28, so it is technically a late-August release rather than a September premiere.

2. The Early Spring: Season 1

Release Date: August 26, 2026
Type: Series Season 1
Episodes: 24
Runtime: Around 45–48 minutes per episode
Genre: Drama, Romance, Workplace Drama
IMDb: 8.3/10
Director: Chiang Chi-cheng
Writer/Producer: Gao Xiao-xian
Cast: Jing Boran, Sun Qian, Liu Xiaobei, Qi Tianqing, Zhang Yezi

About The Early Spring

Fresh graduate Shang Zhitao joins a leading advertising agency and finds herself working under the demanding but talented Luan Nian. What starts as a difficult professional relationship gradually develops into a complicated romance.

The Chinese workplace romance premiered globally on August 26. Its 24-episode run continued into September, making it one of the shows many Netflix viewers were following during the month.

3. The Gentlemen: Season 2

Release Date: September 3, 2026
Type: Series — Season 2
Episodes: 8
Runtime: Around 50 minutes per episode
Genre: Crime, Comedy, Drama, Action
IMDb: 8.0/10
Creator: Guy Ritchie
Directors: Guy Ritchie, Eran Creevy, Nick Rowland
Cast: Theo James, Kaya Scodelario, Joely Richardson, Vinnie Jones, Giancarlo Esposito, Benedetta Porcaroli, Sergio Castellitto, Hugh Bonneville

About The Gentlemen Season 2

Eddie Horniman is no longer simply trying to survive his inherited criminal empire. In Season 2, he wants to expand it, but growing the business means dealing with new enemies, new power players and new complications.

Theo James and Kaya Scodelario return as Eddie and Susie, while the new season introduces several new faces to the world created by Guy Ritchie.

4. The Mentalist: Season 1

Release Date: September 2026 availability
Type: Series Season 1
Episodes: 23
Runtime: Around 43 minutes per episode
Genre: Crime, Mystery, Drama, Psychological Thriller
IMDb: 8.2/10
Creator: Bruno Heller
Cast: Simon Baker, Robin Tunney, Tim Kang, Owain Yeoman, Amanda Righetti

About The Mentalist

Patrick Jane is not actually psychic, but his extraordinary powers of observation make him an unusual consultant for law enforcement. After a serial killer known as Red John destroys his family, Jane uses his skills to help solve crimes while continuing his personal hunt for the man responsible.

The long-running crime drama originally premiered in 2008 and spans seven seasons. Netflix currently lists the series, while IMDb gives it an 8.2/10 rating.

5. Fauda: Season 5

Release Date: September 8, 2026
Type: Series Season 5
Episodes: 11
Runtime: Approximately 30–41 minutes per episode
Genre: Action, Crime, Drama, Political Thriller, Spy Thriller
IMDb: 8.3/10
Creators: Lior Raz, Avi Issacharoff
Director: Omri Givon
Cast: Lior Raz, Mélanie Laurent, Hakim Djaziri, Yaakov Zada Daniel, Doron Ben-David

About Fauda Season 5

Doron returns for another dangerous operation, this time after an old friend’s unsanctioned revenge mission in Marseille draws him into a deep-cover operation. Season 5 takes place two years after October 7, 2023, and continues the series’ fictional story against a backdrop inspired by real-world events. Netflix Tudum confirms that Omri Givon directed the season, with Lior Raz and Avi Issacharoff continuing as creators.

6. Crew Girl: Season 1

Release Date: September 10, 2026
Type: Series Season 1
Episodes: 8
Runtime: Around 40–55 minutes per episode
Genre: Coming-of-Age, Teen Drama, Romance, Sports
IMDb: 6.6/10
Directors: Simon Barry, Norman Buckley, Jacquie Gould, Alysse Leite-Rogers
Cast: Miku Martineau, Jessica Paré, Samuel Braun, Kyle Clark, Thomas Cadrot, Riley Davis, Olga Petsa

About Crew Girl

After her father’s financial scandal changes everything, teenager Teagan Tao moves with her mother to a small town and joins an elite prep school. There’s just one problem: she becomes the only girl on the school’s traditionally all-boys rowing team.

What follows is a mix of competition, friendships, rivalry and romance as Teagan tries to find her place on the team. The eight-episode first season launched on September 10.

7. Monster: The Lizzie Borden Story

Release Date: September 17, 2026
Type: Anthology Series Season 4
Episodes: 8
Runtime: Around 50–60 minutes per episode
Genre: Crime, Drama, Horror, Period Drama
IMDb: 6.6/10
Creators: Ryan Murphy, Ian Brennan
Cast: Ella Beatty, Vicky Krieps, Charlie Hunnam, Rebecca Hall, Jessica Barden, Billie Lourd, Sarah Paulson

About Monster: The Lizzie Borden Story

The latest chapter of the Monster anthology turns to one of America’s most famous historical murder cases: Lizzie Borden. Ella Beatty plays Lizzie, a young woman living under the restrictions of a harsh Victorian household. Her relationship with the family’s new maid, Bridget “Maggie” Sullivan, becomes central to the story as the series moves toward the murders that made Borden infamous.

Netflix describes this as the fourth installment of the anthology and its first season centred on a female subject.

8. Shaque: Trust No One

Release Date: September 24, 2026
Type: Series — Season 1
Episodes: 7
Runtime: Approximately 31–44 minutes per episode
Genre: Crime, Mystery, Thriller, Drama
IMDb: 5.3/10
Director: Rensil D’Silva
Creators: Rensil D’Silva, Siddharth P. Malhotra
Cast: Parineeti Chopra, Jennifer Winget, Tahir Raj Bhasin, Soni Razdan, Anup Soni, Harleen Sethi, Sumeet Vyas

About Shaque: Trust No One

Nine years after her baby disappears from a hospital, Anvita refuses to stop searching for the truth. Each year, disturbing birthday packages keep the mystery alive. When new clues begin to emerge, her investigation turns toward the people closest to her. But as the mystery deepens, Anvita has to question not only whom she can trust, but whether she can trust what she sees.

The seven-episode Hindi thriller premiered on September 24, with Parineeti Chopra making her series debut.

9. Medusa: Season 2

Release Date: September 30, 2026
Type: Series — Season 2
Episodes: Season 2 launch
Runtime: Around 40 minutes per episode
Genre: Drama, Mystery, Thriller
IMDb: 5.3/10 for the series
Creators: Said Chamie, Claudia Sánchez
Directors: Juan Felipe Cano, María Gamboa
Cast: Juana Acosta, Manolo Cardona, Sebastián Martínez, Mariana Mozo, Carlos Torres, Mabel Moreno, Diego Trujillo, Juanita Molina

About Medusa Season 2

Bárbara Hidalgo returns to the centre of the dangerous Medusa family empire, where business, betrayal and personal relationships remain tightly connected. The Colombian thriller follows the continuing struggle for control of the company while new threats emerge around Bárbara. Season 2 is scheduled for September 30, making it one of the final major series arrivals of the month.

Netflix New Series September 2026: At a Glance

Series	Release Date	Genre	IMDb
Mousetrap	Aug 28	Crime, Mystery, Thriller	6.9
The Early Spring	Aug 26	Romance, Drama	8.3
The Gentlemen S2	Sep 3	Crime, Comedy, Drama	8.0
The Mentalist S1	September 2026	Crime, Mystery, Drama	8.2
Fauda S5	Sep 8	Action, Crime, Thriller	8.3
Crew Girl S1	Sep 10	Teen Drama, Romance, Sports	6.6
Monster: The Lizzie Borden Story	Sep 17	Crime, Horror, Drama	6.7
Shaque: Trust No One	Sep 24	Crime, Mystery, Thriller	5.0
Medusa S2	Sep 30	Drama, Mystery, Thriller	5.3
Teach You a Lesson	Jun 5	Action, Drama	8.4

Conclusion

From returning favourites to completely new stories, Netflix new series September 2026 offers a mix of genres rather than sticking to one formula. There are international thrillers, Korean dramas, Indian mysteries, British crime comedy and even a historical true-crime-inspired anthology.

The month also shows why checking release dates matters: some titles on September watchlists actually arrived in late August, while others, such as Teach You a Lesson, premiered months earlier.

So before you start scrolling endlessly through Netflix, check the release dates, pick your genre and build your September watchlist.

Sources

Netflix Tudum: September 2026 release calendar, season announcements and cast information. Netflix Tudum – New on Netflix in September 2026

Netflix: Official title pages, episodes, cast and genre information. Netflix India

IMDb: Ratings, runtime, cast, directors and episode information. IMDb

Release dates refer to the Netflix availability identified in the sources checked. IMDb ratings are subject to change.