Netflix's I Will Find You Ending Twist & Villain Change Explained By Harlan Coben And Series Creator

Published Jun 21, 2026, 2:14 PM EDT

Netflix’s I Will Find You isn’t entirely faithful to the book it's based on.

While the Harlan Coben novel tells the reader fairly early on who the villain is, and what has happened to the missing child at the center of the story, the series keeps both those pieces of information a secret until much later. These deviations from the book were not only endorsed by Coben himself, they were an outgrowth of his active participation in making the show alongside creator and showrunner Robby Hull.

In an interview with ScreenRant's Grant Hermanns, Coben and Hull addressed the reasoning behind these story changes, revealing how casting influenced them to write more for the character of Hayden (Milo Ventimigla), who surprisingly turns out to be one of the story’s villains. Said Coben of Ventimiglia, “Besides being a fantastic actor, when you get someone like that, you want to give him more and more and more. He's so lovable, he's so likable as a human being in real life, I think maybe why this [worked] so well, and as an actor, that Robby and I were just like, ‘We got to give him more!’"

The author continued, “And how lucky for us that we're able to hide the villain behind that face. I think that was it, was just an excitement, push it up, let's get him more involved, let's have him be part of the team, so that when we do pull the rug out from under you, it has that much more emotional impact.”

Showrunner Hull then detailed why the fate of Matthew, the son of I Will Find You's protagonist David (Sam Worthington), is kept a mystery on the show for much longer than it is in the novel. “In the book, you sort of know where Matthew is early on, because you're in these characters' heads,” he explained. “It's about why did he do this, what happened, why is he there. Translating it to the screen, you don't want to give that up.”

He went on, “The audience should be with your character, which is, we don't know where Matthew is. So early on, Harlan and I came up with, ‘Let's hide him, let's figure out a different way than the book went. Let's hide who did it. Let's add that mystery, and that propulsiveness of the classic, “Where is he?” And then also add the why and the how and the when.’"

Coben and Hull also addressed the show’s dramatic final confrontation between Hayden and his mother Gertrude (Madeleine Stowe), which includes a big monologue by the latter. “You have an actress of Madeleine's pedigree and abilities, and she just lights up the screen in an interesting way,” Coben said. “You can't take your eyes off of her, and I think, Robby was having a real fun time, since you wrote that.”

Hull replied, “I wrote that episode and the speech. I really pulled from the book, and what I love about that dynamic between Hayden and his mom is, we talk a lot about what would you do to protect your child as a parent. This is sort of the flip side of that coin. What happens when you try to protect them and it goes horribly, horribly wrong? Because I think parenthood brings out the best and the worst in people, and so we wanted to sort of show all sides of that of that dynamic.”

I Will Find You is streaming now on Netflix.

Release Date June 18, 2026

Network Netflix

Showrunner Robert Hull

Cast

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  Logan Browning

  Sarah Greer

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