Binge Watch Treason on Netflix

Adam Lawrence was trained and groomed by MI6; his career seems set.

When the past catches up with him in the form of Kara, a Russian spy with whom he shares a complicated past, he is forced to question everything and everyone in his life.

A triangular relationship forms between Kara, Adam and his wife, Maddy; three people who are trying to expose each other’s secrets, navigate political and diplomatic relationships, whilst hanging onto their personal lives, and those they love most.

Adam Lawrence (Charlie Cox), deputy chief of MI6, is at the school of his son Callum (Samuel Leakey), talking to his class about his job.

In the meantime, his boss Sir Martin Angelis (Ciarán Hinds), dubbed “C” for “Control”, sits at his fancy dining club with the president of the Supreme Court, showing him evidence of an affair and an illegal visa that he can make go away if the official plays ball.

The Basic Plot of Treason on Netflix

A woman sneaks into the kitchen of the club and poses as a waitress; she brings Angelis his drink, which she’s already doctored.

He drinks it and goes into cardiac arrest.

As the assassin, Kara Yerzova (Olga Kurylenko), escapes, her driver hits a delivery person and gets out to help.

She wants to help the driver, but she later tells him “I don’t fuck up,” as she poisons him.

Because Angelis is incapacitated, Lawrence is immediately promoted to C.

As he coordinates the investigation into Angelis’ poisoning, his family has to adjust to a new normal of armed escorts and threats.

Armstrong’s wife, Maddy de Costa (Oona Chaplin), a former military intelligence officer, knows he’s up to the task.

Callum thinks it’s cool, but 14-year-old Ella (Beau Gadsdon) hates all of this new scrutiny on them.

A mysterious gift left in Angelis’ hospital room leads Armstrong to rendezvous with Kara.

They know each other from his field days, when Kara was SVR (Russian intelligence) and the two of them were lovers.

She’s been booted out of SVR and tells Armstrong that she poisoned Angelis so Armstrong could help her out with his new top-level security clearance.

After all, he owes her, considering every intelligence win he got while climbing the MI6 ladder was provided by her, or at least she claims.

At the same time this is going on, a CIA team lands in London, led by Dede Alexander (Tracy Ifeachor).

Their target is Armstrong, but she’s also there to reconnect with Maddy.

The two served together in Afghanistan, and Dede pretends that she’s in London on vacation, when her real purpose is to make her friend an unwitting asset against Armstrong.