For over a decade, Charlie Cox has been synonymous with Daredevil, bringing a raw intensity and moral complexity to the Man Without Fear that rivals the best superhero casting in history. But in Netflix's taut five-episode spy thriller Treason, Cox sheds the devil horns for a tailored suit and a world of political intrigue, delivering what might be his most emotionally mature and gripping performance yet.
Created by Matt Charman, the Oscar-nominated writer of Bridge of Spies, Treason is a sleek, high-stakes espionage drama that feels like a modern-day Spooks or The Night Manager. Cox plays Adam Lawrence, a rising MI6 officer who is suddenly thrust into the top job after his mentor, Sir Martin Angelis (Ciarán Hinds), is poisoned by a Russian spy with a personal vendetta. That spy, Kara Yerzov (Olga Kurylenko), also happens to be Lawrence's former lover—and she's not afraid to use their past to blackmail him.
What follows is a relentless game of cat and mouse, as Lawrence must navigate jealous colleagues, a suspicious CIA investigation, and the impossible task of protecting both his country and his family. When his daughter is kidnapped, Lawrence is forced to commit treason to save her, blurring the line between heroism and betrayal. It's a role that demands the same earnestness and barely restrained fury Cox brought to Matt Murdock, but with a new layer of weary, middle-aged desperation.
Cox has always excelled at playing men torn between noble intentions and darker impulses, and Treason gives him the perfect canvas. His Lawrence is a devoted husband and father, but also a man with secrets—and Cox's performance is a masterclass in conveying guilt and shame through micro-expressions and fidgety body language. When he begs his wife Maddy (Oona Chaplin) to believe in his love, you feel the weight of every lie he's told.
The series also benefits from strong supporting turns, particularly from Kurylenko as the enigmatic and dangerous Kara, and Chaplin as the fiercely intelligent wife who refuses to be a pawn. But it's Cox's show from start to finish, and he carries it with the same commitment he brought to Hell's Kitchen. For fans who have only seen him in the MCU, Treason is a revelation—a reminder that Cox is a character actor of the highest order, capable of anchoring a tense, adult thriller without a single punch thrown.
If you're looking for a binge-worthy spy series that doesn't overstay its welcome, Treason is a hidden gem. And if you're still mourning the end of Daredevil, it's proof that Charlie Cox's best work may still be ahead of him. For more underrated thrillers, check out our list of Forgotten Gems: 5 Near-Perfect Thrillers That Deserve a Second Look.
