September brings major returning shows alongside highly anticipated new series across leading international OTT streaming platforms.
The lineup features crime, action, espionage, mystery and true-crime dramas for diverse streaming audiences.
The Gentlemen, Slow Horses, Neagley, Monster and MobLand headline September’s most anticipated web series releases.
September 2026 is bringing plenty of exciting options for OTT viewers, especially for those who enjoy crime, action, thrillers and dark dramas. Some familiar favourites are returning with new seasons, while a few new shows are expanding popular franchises.
If you are planning your September watchlist, here are five web series worth keeping an eye on:
Release Date: September 3
Theo James is back as Eddie Horniman in the second season of ‘The Gentlemen.’ The series, created by Guy Ritchie, blends British aristocracy with crime, dark humour and plenty of twists.
The new season continues Eddie’s journey through the criminal underworld surrounding his family’s estate. Kaya Scodelario also returns as Susie Glass, adding to the complicated relationship at the centre of the story. With its sharp writing, stylish action and unpredictable characters, ‘The Gentlemen’ remains one of Netflix’s most anticipated returning shows.
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Release Date: September 16
Gary Oldman returns as the grumpy but brilliant Jackson Lamb in ‘Slow Horses Season 6.’ The popular British spy drama follows the agents of Slough House, a group of MI5 operatives who have been pushed aside but repeatedly find themselves caught up in major threats.
The sixth season is based on Mick Herron’s novels Joe Country and Slough House. Jack Lowden, Kristin Scott Thomas and Olivia Cooke are also among the returning cast. New episodes will arrive weekly, giving fans another reason to settle in for the slow-burning espionage drama.
Release Date: September 16
The Reacher universe is getting bigger with ‘Neagley,’ a new series centred on Frances Neagley. Maria Sten reprises the role, which she first played in Reacher.
The story follows Neagley as she investigates the suspicious death of someone from her past. Her military background and investigative skills quickly pull her into a dangerous case. While Reacher fans will recognise the world and character, the spin-off puts Neagley firmly in the spotlight and gives her a story of her own.
Release Date: September 17
Netflix’s ‘Monster’ anthology is turning its attention to one of America’s most notorious criminal cases. ‘Monster: The Lizzie Borden Story’ follows Lizzie Borden, who was accused of killing her father and stepmother in 1892.
Ella Beatty plays the central role, with Vicky Krieps, Charlie Hunnam and Rebecca Hall also part of the cast. The eight-episode series comes from Ryan Murphy and Ian Brennan, who are known for turning real-life crimes into dramatic, character-driven stories.
Release Date: September 18
The battle between London’s criminal families continues in ‘MobLand Season 2.’ Tom Hardy returns as fixer Harry Da Souza, alongside Pierce Brosnan and Helen Mirren.
The second season picks up the tension surrounding the Harrigan family and its rivals, promising more betrayals, violence and shifting alliances. With 10 episodes scheduled, the new season will roll out weekly after its September 18 premiere.
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From ‘Guy Ritchie’s’ stylish crime world to the tense spy missions of ‘Slow Horses,’ September has something for viewers who like their OTT entertainment with plenty of drama. Add ‘Neagley,’ ‘Monster: The Lizzie Borden Story’ and ‘MobLand’ to the mix, and there is no shortage of shows to add to your September binge-watch list.
1. Which web series are releasing on OTT platforms in September 2026?
September 2026 will see several major web series arrive on streaming platforms. The lineup includes The Gentlemen Season 2, Slow Horses Season 6, Neagley, Monster: The Lizzie Borden Story and MobLand Season 2.
2. When is The Gentlemen Season 2 releasing on Netflix?
The Gentlemen Season 2 is scheduled to premiere on Netflix on September 3, 2026. Theo James returns as Eddie Horniman, with Kaya Scodelario also reprising her role as Susie Glass in Guy Ritchie’s crime drama.
3. When will Slow Horses Season 6 premiere?
Slow Horses Season 6 is scheduled to premiere on Apple TV+ on September 16, 2026. Gary Oldman returns as Jackson Lamb, while the new season continues the espionage adventures of the agents at Slough House.
4. What is Neagley about and when does it release?
Neagley is a Reacher spin-off focusing on Frances Neagley, played by Maria Sten. The action series follows her investigation into a suspicious death involving someone from her past and is scheduled to premiere on Prime Video on September 16, 2026.
5. When are Monster: The Lizzie Borden Story and MobLand Season 2 releasing?
Monster: The Lizzie Borden Story is scheduled to premiere on Netflix on September 17, while MobLand Season 2 arrives on Paramount+ on September 18. Both series explore dark worlds involving crime, violence, mystery and complicated characters.