Netflix’s Addictive 6-Part Crime Thriller Is Perfect for ‘Slow Horses’ Fans

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Numan Acar as Hakan, Kem Hassan as Aziz, in Legends Image via Netflix

Published Jun 21, 2026, 1:58 PM EDT

Liam Gaughan is a film and TV writer at Collider. He has been writing film reviews and news coverage for ten years. Between relentlessly adding new titles to his watchlist and attending as many screenings as he can, Liam is always watching new movies and television shows. 

In addition to reviewing, writing, and commentating on both new and old releases, Liam has interviewed talent such as Mark Wahlberg, Jesse Plemons, Sam Mendes, Billy Eichner, Dylan O'Brien, Luke Wilson, and B.J. Novak. Liam aims to get his spec scripts produced and currently writes short films and stage plays. He lives in Allentown, PA.

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Spy content is more popular than ever in both television and film, and it's become an escapist genre for those looking for action and adventure. At this point, the popular depiction of espionage is completely removed from reality and contains no more realism than a superhero story. Legends is based on an incredible true story that was kept under wraps for decades by the British government, even though it played a significant role in protecting the nation from the corrupting influence of drugs. What makes Legends distinct is that it is a story about ordinary people who are called on to go above and beyond, as it’s quickly proven that the “traditional” approach to curbing crime has been failing for generations. It’s not only a revelatory new perspective on the true crime genre but also a remarkable character study that makes for one of 2026’s most entertaining shows.

Legends is based on a real program developed in 1990 when Prime Minister Margaret Thatcher was attempting to end her administration with a public relations victory, given that addiction had become a significant issue in the last years of her term. After the Home Secretary (Alex Jennings) tasks Her Majesty’s Customs and Excise with finding a means to infiltrate and identify dealers, suppliers, and financiers involved in the drug trade, the spymaster Don Clarke (Steve Coogan) creates a radical plan for his operation. The government recruits Customs officers who have worked in secretarial, clerical, and administrative offices to go undercover, as they know the cracks in Great Britain’s infrastructure better than anyone. That these characters don’t have advanced MI6 training or years of combat experience doesn’t just distinguish them from the protagonists of other spy shows but also makes Legends a more relatable thriller.

Although Coogan proves to be a compelling dramatic actor who is more than just a mentor, as Don is risking his own livelihood on a dangerous plan, Legends works because of its strong ensemble cast playing the undercover agents. The title itself refers to the “Legends” they create while undercover, as getting into character to be seamless is critical to the success of the operation. The most significant member of Don’s team is Guy, played by the highly underrated actor Tom Burke. He is a security checkpoint officer who has long felt powerless in his position. Guy’s desire to be part of Don’s team is not just about simply helping make a difference in his country but also because he has always felt unfulfilled in life and wants to make use of his potential. The parallels between the two characters are compelling, as Don immediately identifies Guy as being a “lone wolf” like he once was when he was a younger agent. Although Legends clips along at a rapid rate, it doesn’t forget that going undercover takes a serious toll on the mental health of these agents. It does a great job of showing how challenging it is for Guy to adjust back to a normal life and learn how to be himself again.

Gabriel Basso as Peter Sutherland outside next to a brick wall in Season 2 of The Night Agent Related

Legends pays extraordinary attention to detail in showing the minutiae of how Guy and his fellow undercover agents gain the trust of drug smugglers, but the series is not blind to the political machinations that are involved in the program. Don understands that any valiant efforts made by his team will be framed as a victory for the Thatcher government, which itself is responsible for creating economic and social instability that allowed for drug culture to thrive. The episode “This Is Liverpool” shows a heartbreaking story about a young veteran who returned home from service and became an addict and later died; his is sadly one of countless similar stories, which is why Don’s team is under such a time crunch.

It’s revealed at the end of the series that the Legends program was not disclosed until recently, and those who risked their lives were only thanked internally, without any public acknowledgment. While this was partially due to the potential dangers of having the team’s identities exposed, it’s yet another case in which a governmental body was able to take credit for a victory that it had never fully supported with resources or funding. Although it’s a stark and unfortunately unsurprising commentary on contemporary politics, Legends is not a cynical series. In fact, the show’s belief that anyone can make a difference and that people rise when opportunities are presented to them is a truly inspirational statement.

Legends makes for a perfect binge-watch because the series has six episodes without any filler, as it gets deep into the undercover scheme by the end of the first episode. Considering that it is based on a true story that encapsulates a specific period of time, it also ends on a conclusive note that leaves no room for a continuation or sequel. Legends provides all the suspense and intrigue that espionage fans would seek, but it’s also an informative, inspiring, and thought-provoking show about what it actually means to be a spy.

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Legends

Release Date 2026 - 2026-00-00

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