Lights out and press play

Whether you’re battling the post-summer blues or simply looking to expand your watchlist, September 2025 is packed with compelling content across all major streaming platforms. From thrilling mysteries to a romantic comedy and a riveting K-Drama, September 2025 offers something for every mood and viewing preference—these selections will keep your watchlist full and your evenings entertained.

If you haven’t checked it out already, be sure to see our comprehensive guide to the best new book releases of September 2025. While you’re curating your streaming watchlist for those quiet evenings, don’t forget that this month also brings an impressive lineup of literary debuts, highly anticipated sequels from beloved authors, and thought-provoking non-fiction titles that are perfect for balancing your screen time.

Here’s your guide to the best new TV shows and movies to watch in September 2025:

Here are all the best new TV shows and movies in September 2025 to watch:

Task

From creator Brad Ingelsby (Mare of Easttown), this HBO Original crime drama follows an FBI agent (Mark Ruffalo) who heads a task force to put an end to a string of violent robberies led by an unsuspecting family man. Set in the working-class suburbs of Philadelphia, the seven-episode limited series explores the cat-and-mouse game between law enforcement and criminals in an authentic blue-collar setting.

Release Date: 7 September

Only Murders in The Building (Season 5) 

Back on their investigative streak, Charles, Oliver and Mabel plunge into the shadows of New York and beyond to uncover who killed their beloved doorman, Lester. But, instead of discovering what caused Lester’s death, the trio uncovers a treacherous network linking wealthy elites, traditional crime families and enigmatic Arconia tenants. As they dig deeper, the amateur detectives uncover a stark contrast between the familiar New York they once knew and an evolving metropolis where established criminal organisations clash with emerging, more ruthless adversaries.

Release Date: 9 September

Tempest

For those who love a little K-Drama now and then, it’s time to devour this newest spy romance TV series. Set in modern-day Korea, Tempest follows Munju, a highly accomplished diplomat and former ambassador to the United States, and Sanho, an international special agent, as they race to uncover the truth behind an attack that threatens the future stability of the Korean peninsula.

Release Date: 10 September

The Girlfriend

Based on Michelle Frances’ novel of the same name, The Girlfriend follows Laura, a woman who seemingly has it all: a glittering career, a loving husband, and her precious son, Daniel. Her perfect life begins to unravel when Daniel brings home Cherry, a girlfriend who changes everything. After a tense introduction, Laura grows suspicious of Cherry’s motives. The question becomes whether Cherry is truly a calculating opportunist or if Laura’s concerns stem from her own insecurities.  

Release Date: 10 September

The Wrong Paris

If you need something light, funny and romantic for cosy nights in, here’s your best shot. The Wrong Paris follows a young woman who joins a dating show, thinking it’s in Paris, France, but it’s actually in Paris, Texas. She plots a way to get eliminated until her unexpected feelings for the bachelor complicate her plans. 

Release Date: 12 September

Alice in Borderland (Season 3)

It’s time to go back to the nightmarish alternate reality—Borderland, this time it’s even bigger and more twisted than ever. Season 3 follows Arisu and Usagi—now married—as they lead a happy life together, although their memories of Borderland surface in dreams and hallucinations. Their peaceful existence shatters when Usagi mysteriously disappears. With guidance from Ryuji, a researcher of the afterlife, she finds herself pulled back into the Borderland. Teaming up with new players, they must face the yet-unseen “Joker” stage in a desperate bid to find a way back to their original world. The Borderland returns on an even grander scale, with stunning visuals that will captivate viewers. 

Release Date: 25 September