Millie Bobby Brown, David Harbour Set Netflix Spy Series After Stranger Things

David Harbour and Millie Bobby Brown, known for their roles in “Stranger Things” over five seasons, are set to reunite on screen. Netflix has confirmed a direct-to-series order featuring the duo as stars and executive producers in an untitled Jack Thorne spy thriller produced by A24. Thorne, who co-created the Emmy-winning series “Adolescence” and “Lord of the Flies” for Netflix, has also written the popular “Enola Holmes” films starring Brown.

The series revolves around Matt Wolfe, a former FBI agent turned security expert, who is forced back into action when his daughter Rebecca, an FBI agent herself, goes missing on a mission. This unexpected event drags him into a world that has advanced beyond his previous experience.

Jinny Howe, Netflix’s Head of Scripted Series for the U.S. and Canada, expressed enthusiasm for the project, saying, “We are thrilled to bring this spy drama to life with such talented individuals we have been privileged to work with before. Jack Thorne’s talent for uncovering the human element within a thriller is unparalleled, and seeing Millie Bobby Brown and David Harbour reunite as a father and daughter in crisis is sure to captivate audiences. A24 is the ideal partner to deliver this story to our global members.” 

Since “Stranger Things” wrapped up on December 31, 2025, Harbour and Brown have remained active. Brown is set to appear in “Enola Holmes 3” on July 1, while Harbour has been featured in HBO’s “DTF St. Louis.”

While promoting these projects, both actors hinted at their upcoming collaboration. In a June 10 cover story for Variety, Harbour mentioned, “Straight up, Millie and I are working on several …,” pausing before adding, “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.” 

During a recent appearance at the 92nd Street Y, Brown confirmed the project with Harbour is definite, stating, “Father-daughter is where we live, but Netflix will always be our home.”

Brown further revealed to “Happy Sad Confused” host Josh Horowitz that the project with Harbour is advancing faster than anticipated, attributing the concept to Harbour’s initiative.

Despite describing their relationship as a “father-daughter” bond, Brown and Harbour acknowledged past tensions, clarifying reports of a crisis. A Daily Mail story from the previous fall alleged Brown filed an HR complaint against Harbour at Netflix before “Stranger Things 5” began production. Harbour explained, “In families, it’s OK because you’re just in a disagreement and then you come back together. The problem with a billion-dollar show is that there’s just hundreds of people who want to get involved. It was just a simple rupture-and-repair thing that, once we cleared everybody out of the way and talked to each other, we’re fine.”

Brown shared her perspective 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.”

In “Stranger Things,” Harbour portrayed Jim Hopper, Hawkins, Indiana’s police chief, who adopted Brown’s character, Eleven, a powerful lab-generated child. The series concluded with Eleven seemingly sacrificing herself to save the world. Recently, both actors discussed whether Eleven survived. Brown noted she had agreed with the Duffer brothers not to disclose Eleven’s fate.

For Harbour, the matter appeared straightforward, as he told Variety‘s Daniel D’Addario, “Right from the very beginning of that series, 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 upcoming 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.