David Harbour and Millie Bobby Brown, who co-starred on “Stranger Things” together for five seasons, will once again share the screen. Netflix has announced a straight-to-series order for the pair to star in and executive produce an untitled Jack Thorne spy thriller from A24. Thorne not only co-created Emmys juggernaut “Adolescence” and “Lord of the Flies” for Netflix, but he’s written the streamer’s “Enola Holmes” movies, which star Brown.

According to the logline for the new series, “Disgraced FBI agent turned security expert Matt Wolfe is drawn back into the world he left behind when his estranged daughter, Rebecca — now an FBI agent determined to follow in his footsteps — vanishes on a mission, forcing him back into a field that has evolved beyond him.”

“We are delighted to bring this spy drama to life with an extraordinary group of talent we’ve been fortunate to collaborate with before,” wrote Jinny Howe, Netflix’s Head of Scripted Series, U.S. and Canada. “Jack Thorne’s ability to find the deeply human story inside a thriller is unmatched, and watching Millie Bobby Brown and David Harbour reunite — this time as estranged father and daughter on opposite sides of a crisis — is something audiences are going to love. A24 is the perfect partner to bring this story to our members around the world.” 

Since “Stranger Things” concluded on Dec. 31, 2025. Harbour and Brown have kept busy. Brown’s “Enola Holmes 3” premieres on July 1, and Harbour starred on HBO’s limited series “DTF St. Louis.”

As they’ve promoted those projects recently, both Brown and Harbour began teasing this reunion. In Variety‘s June 10 cover story about Harbour, he said: “Straight up, Millie and I are working on several …,” before stopping himself, and then continuing. “You’ll see more of me and Millie — 10 years wasn’t enough. There is a special bond there. I love her. She loves me.” 

And in Brown’s appearance this week at the 92nd Street Y, she said the future project with Harbour is “concrete,” before adding, “Father-daughter is where we live, but Netflix will always be our home.”

“The David Harbour project is sooner than expected,” Brown said later in the conversation with “Happy Sad Confused” host Josh Horowitz. “And it’s David’s idea, so kudos to him.”

For Brown’s part, she had this to say in an email to Variety: “Over time, our relationship became much more collaborative creatively. When you work with someone for that many years, we could really push each other emotionally in scenes. Even though the series has ended, there’s still a lot of gratitude.”

On “Stranger Things,” Harbour played Jim Hopper, the chief of police of Hawkins, Indiana, who adopted Brown’s Eleven, an all-powerful, lab-generated child at the center of the show. The “Stranger Things” series finale ended with Eleven seeming to sacrifice her life in order to save the world, and recently, both actors have weighed in on the question of whether she is actually alive. Brown said she made a pact with the Duffer brothers not to reveal Eleven’s fate.

But to Harbour, the question is a simple matter, according to what he told Variety‘s Daniel D’Addario. “Right from the very beginning of that series,” he said, “we love this little girl, but you really can’t have a little girl in Hawkins, Indiana, with supernatural powers running around. She just cannot exist.”

The new Netflix spy series will also be executive produced by Jake Bongiovi and Robert Brown for PCMA Productions; Joe Hipps and Patrick McDonald for Cut To; KC Wenson for Bravo Axolotl. Brown is represented by WME, 2PM SHARP and Hansen, Jacobson. Thorne’s team is UTA, Casarotto Ramsay and Associates, Sloan Offer, Weber and Dern and ID.