“Treason” is a spy thriller built on a simple idea: a man gets promoted, and the woman who made it happen asks for a favor he cannot refuse. Netflix’s five-episode miniseries, created by Matt Charman, follows Adam Lawrence, an MI6 deputy, as his world collapses around him after he reconnects with Kara Yusova, a former lover and ex-SVR operative who poisoned his boss, Sir Martin Angelis.
The premise is strong. Adam takes over MI6 while Sir Martin recovers from poison administered in his whisky. Kara reveals she engineered his rise, and now she wants information on a ferry bombing in exchange for details on five men killed in Baku, her former team. The CIA watches him through a surveillance team led by Dede, who also happens to be an old friend of Adam’s wife, Maddy. The tension is immediate: Kara holds his secrets, the CIA watches him, and his family is caught in the middle.
Trailer, via Netflix.
Kara Yusova and the Poisoning
Olga Kurylenko plays Kara as a cool, calculating threat. She poisoned Sir Martin to push Adam forward, and she knows exactly what she is doing. Her scenes with Adam are the engine of the series, and Kurylenko sells the mixture of seduction and menace that makes Kara dangerous. When she offers the ferry intel in exchange for the MI6 files on the Baku killings, the deal is clean and unsettling at once.
Ciarán Hinds plays Sir Martin Angelis as a figure of authority whose fall sets everything in motion. His poisoning is the catalyst, and his recovery looms over every episode. Hinds grounds the series in a sense of loss, making the stakes personal even when the plot grows complicated.
Adam Lawrence’s Compromise
Charlie Cox plays Adam as a man who thought he had arrived. He takes over MI6, but Kara’s revelations force him to see his own career as a scheme. The series leans on Cox’s ability to show confusion and fear beneath the surface of competence. Adam is compromised, and the show keeps asking how far he will go to protect himself.
Oona Chaplin plays Maddy Lawrence, Adam’s wife, with quiet strength. She catches up with Dede, the CIA agent, under the pretense of friendship, and Chaplin carries the weight of being both a wife and a target. The scenes between Maddy and Dede establish a bond that feels real, and Chaplin makes Maddy’s concern for her family feel urgent rather than passive.
The CIA Surveillance and the Ferry Bombing
Tracy Ifeachor plays Dede Alexander, the CIA agent who watches Adam. She knows Maddy from Afghanistan, and she uses that connection to gather information. The surveillance thread runs through the series, adding pressure to every conversation Adam has. It is a smart move, because it means Adam cannot trust anyone, not even his own wife.
The ferry bombing is the payoff. Kara offers information on it in exchange for the Baku files, and the series builds toward that moment with genuine tension. The show understands that a spy thriller succeeds when the stakes are clear and the clock is ticking.
The Family at Risk
The children complicate things further. Ella, Adam’s daughter, leaves school without her protection officer and is followed, which sends shockwaves through the family. The threat to Ella is a reminder that this is not just a game of power, but a matter of who lives and dies.
The supporting cast fills out the world. Danila Kozlovsky plays Lord Anton Melnikov, an old acquaintance of Kara’s. Samuel Leakey plays Callum, Adam’s son and Maddy’s stepson. Beau Gadsdon plays Ella. Simon Lenagan plays Robert Kirby, and Alex Kingston plays Audrey Gratz. Avital Lvova plays Irina Belova, Kara’s former boss in the SVR. Patrick Hamilton, played by Adam James, is an MI6 agent and Adam’s friend.
“When Adam arrives, he meets Kara, a former lover and ex SVR operative, who discloses that she poisoned Sir Martin.”
What Works and What Doesn’t
The pacing is uneven. Some episodes drag while others crackle with tension. The series tries to balance a lot of moving parts — Kara’s investigation, the CIA surveillance, the Baku files, the ferry bombing — and not all of it lands with equal force. The show also leans heavily on exposition, often spelling out what should be shown through action.
But the core relationship between Kara and Adam holds the series together. Their scenes have a chemistry that keeps the plot from losing steam. Cox and Kurylenko play off each other with ease, and their interactions carry more weight than the broader political maneuvering around them.
“Treason” is a solid, if flawed, spy thriller. It has a strong premise, capable performances, and real tension in its central conflict. It stumbles with pacing and excess explanation, but the performances keep it grounded.
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