Betrayal poster
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Betrayal(2026)

Archived · ITVX

4 eps
S01
ThrillerEspionageDrama
ON AIR: FEB 8Season 1Archived listing

What to Expect

PremiereLens read

Betrayal builds its espionage around institutional pressure rather than action. A veteran MI5 agent finds himself caught inside a conspiracy he would normally be trained to spot, which puts him in the uncomfortable position of being both investigator and suspect. The pacing is deliberate and investigation-driven, with suspicion tightening through office politics and procedural distrust as much as through any external threat.

His marriage runs on a parallel track of strain, so the professional crisis and the domestic one feed each other rather than taking turns. Secrets that might have stayed compartmentalized start bleeding across the boundaries he has spent a career maintaining, and the cost accumulates in two directions at once: toward his standing inside the service and toward the person waiting at home.

Best for

veteran spy mystery, workplace distrust and Thriller

Story lane

Thriller and Espionage

Commitment

Season 1 · 4 episodes

Where

ITVX

Official Premise

When an assassination links a veteran MI5 agent to a conspiracy, he races to find the truth and protect his career, his marriage, and his country.

Watch Next If This Is Your Lane

Start with the closest match, then check out two more shows with a similar feel, pace, mood, or theme.

The Undeclared War poster

The Undeclared War

Channel 4 • Jul 21, 2026
DramaThriller

Set in 2024, in the run up to a British general election, THE UNDECLARED WAR tracks a leading team of analysts buried in the heart of GCHQ (the UK's version of the NSA), secretly working to ward off a cyber-attack on the country's electoral system.

Why this pick

The Undeclared War delivers the same restrained British intelligence tension as Betrayal, where trust erodes inside the workplace and every conversation feels like a trap. Analysts juggle secrecy and electoral sabotage with a slow, dread-building pace, trading big action for the kind of pressure that makes personal relationships crack under investigation.

Slow Horses poster

Slow Horses

Apple TV • Sep 24, 2025
CrimeDrama

A dysfunctional team of MI5 agents navigate the espionage world's smoke and mirrors to defend the UK from sinister forces.

Why this pick

Slow Horses shares Betrayal’s focus on a compromised operative under suspicion, but it filters the stress through dry humor and office chaos. The team’s tradecraft grind and constant bureaucratic friction turn danger into something you feel in every awkward meeting, even as jokes and grudges keep the pace sharp and the stakes personal.

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