September 2025 Streaming Releases: What to Watch

September 2025 brings a packed slate of streaming releases that lean into darker, more intense storytelling — from gothic teen mysteries and zombie horror to espionage, survival, and superhero deconstruction. With big names like Sylvester Stallone and Jenna Ortega leading ensemble casts, platforms are doubling down on established franchises while offering interconnected flavors that cross genres, such as Gen V’s blend of superhero and social thriller or Only Murders in the Building’s mix of crime and satire. Arriving just ahead of October’s spooky season, these shows set the mood early, making September a power month for genre fans.

Wednesday – Season 2 (Volume 2)

Platform: Netflix
Release date: September 3, 2025

The Addams family’s strangest child returns. After the cliffhangers of Wednesday Season 2 Part 1, Volume 2 picks up with Jenna Ortega’s Wednesday Addams struggling with her visions, the dangers closing in at Nevermore, and the specter of supernatural threats looming over her friends and family.

Expect more of the same macabre wit, mystery, and gothic intrigue — and possibly answers to some of the deeper mythology that the first half left dangling.

Only Murders in the Building – Season 5

Platform: Hulu
Release date: September 9, 2025

The charismatic crime-podcaster trio — Charles, Oliver, and Mabel — are back, but this time they’re diving deep into the underworld. In Season 5, the investigation into the death of the Arconia’s doorman pulls them into mafia politics and power struggles lurking under the building’s façade.

As usual, expect a star-studded guest cast, a few meta jokes, and plenty of twists.

Gen V – Season 2

Platform: Prime Video
Release date: September 17, 2025

From The Boys universe, Gen V expands on the dark side of superheroes, focusing on morally fraught young powers in a militarized training ground. Season 2 ramps up the stakes: politics, corruption, and internal rivalry intensify amid external threats.

It’s part shadow thriller, part social satire — a great pick for fans of incisive superhero narratives.

Tulsa King – Season 3

Platform: Paramount+
Release date: September 21, 2025

Sylvester Stallone returns as Dwight “The General” Manfredi, the ex-con kingpin trying to expand his power in Tulsa. Season 3 promises more of the darkly comedic crime drama, with Dwight navigating turf wars, new enemies, and the perils of holding power.

For those who like their gangster stories with a twist of character-driven grit, Tulsa King remains a standout.

Slow Horses – Season 5

Platform: Apple TV+
Release date: September 24, 2025

Adapted from Mick Herron’s spy novels, Slow Horses follows MI5’s misfits — agents sidelined for mistakes — forced to take on dangerous tasks. Season 5 escalates the stakes with deeper conspiracies and darker missions.

It balances espionage, satire, and moral ambiguity, making it a must for spy-thriller fans.

Alice in Borderland – Season 3

Platform: Netflix
Release date: September 25, 2025

After a long wait, the dystopian survival saga returns. Arisu and Usagi face even deadlier games and impossible moral dilemmas as the Borderland merges further with reality.

Fans can expect intricate worldbuilding, tense encounters, and emotional payoffs.

Marvel Zombies

Platform: Disney+
Release date: September 24, 2025

Inspired by the What If...? Marvel episode, this is a horror-inflected reimagining of the MCU — a world overrun by zombified heroes. Expect action, gore, and the creative chaos that comes when superpowers don’t save you from decay.

For Marvel fans looking to venture into darker territory, Marvel Zombies brings a fresh, gruesome spin to the multiverse.