Millie Bobby Brown and David Harbour to Reunite for Netflix Spy Thriller Series from A24

Netflix has officially greenlit a straight-to-series order for an untitled spy thriller that will reunite Stranger Things stars Millie Bobby Brown and David Harbour. The high-profile project, produced by indie powerhouse A24, casts the duo as a father-daughter spy team, marking their first major collaboration outside of the Hawkins, Indiana universe. Both Brown and Harbour are set to star in the series and will serve as executive producers, cementing their creative partnership with the streaming giant as their flagship sci-fi series prepares for its final season.

The series is penned by acclaimed British screenwriter Jack Thorne, who shares a successful history with both Netflix and Brown, having written the screenplays for the streamer's hit Enola Holmes franchise. Thorne, whose extensive credits include co-creating the Emmy-winning drama Adolescence and writing the West End stage play Harry Potter and the Cursed Child, brings a proven track record of balancing high-stakes drama with complex character relationships. Partnering with A24, a studio increasingly known for prestige television ventures like Beef and The Sympathizer, the untitled project promises to blend gripping espionage action with a nuanced, character-driven family dynamic.

Reimagining a Fan-Favorite Dynamic

The casting taps directly into the beloved on-screen chemistry between Harbour and Brown, whose characters—Chief Jim Hopper and the superpowered Eleven—anchored the emotional heart of Stranger Things across its five-season run. Fans have long celebrated their surrogate father-daughter bond, a dynamic that this new series looks to reinvent through a contemporary, action-packed lens. Industry insiders note that securing both actors for a joint project represents a major coup for Netflix, allowing the platform to retain its top-tier homegrown talent in a brand-new vehicle.

While plot details remain closely guarded, the series represents a significant expansion of Netflix's relationship with its key creatives. Production schedules and a projected release date have yet to be announced as the project enters active development. Given the high-profile nature of the talent involved, the series is expected to be a major priority for Netflix and A24 heading into the upcoming pilot and production cycle.