Recently, I attended the 30,618th performance of Agatha Christie’s The Mousetrap in the West End. I know this because the selfie-friendly wooden board in the theatre’s foyer told me so. I’ve never attended a 30,618th performance before, because there haven’t been any. The world’s second longest-running show, Les Misérables, is still in the measly 16,000s.
The Mousetrap opened at Ambassadors Theatre on 25 November 1952, just 10 months into the reign of Elizabeth II, moved next door to St Martin’s in 1974, and has run unbroken, bar the rude interruption of Covid-19, ever since. It plays to mostly full houses nine times a week, 52 weeks a year. The walls display decades of newspaper cartoons riffing on the play’s fabled longevity. One shows an astronomer looking through a telescope: “I can see the beginning of the universe and the opening of The Mousetrap.” Just as seeing the Mona Lisa at the Louvre is not just about admiring a painting, The Mousetrap is both a play and a theatrical ritual. Over 10 million people have seen it and now I’m one of them.
The play’s first producer, Peter Saunders, justifiably called his memoir The Mousetrap Man. When ticket sales first began to flag, he was determined to hit the 1,000-performance mark in April 1955 so he made it a publicity event. He loved a stunt (there were performances at Colditz Castle and Wormwood Scrubs) and his relentless marketing paid off. On 13 September 1957, The Mousetrap became London’s longest-running play, overtaking the 1,997 performances of Noël Coward’s Blithe Spirit. (Coward set a congratulatory telegram: “Much as it pains me …”) Seven months later, it beat the 1916 musical Chu Chin Chow to become the longest-running production of any kind. In 1970, it took the world record from The Drunkard in Los Angeles. With each milestone, The Mousetrap became a self-referencing, self-perpetuating phenomenon: it lasted because it was famous for lasting. “Peter Saunders rode out very difficult periods: economic malaise, theatrical malaise, ups and downs in the culture,” says the current producer, Brian Fenty, the co-founder and CEO of ticketing platform TodayTix. “He would get scrappy and figure out what it took to make it work.”
Really, what Agatha Christie was writing about was national identity. Who the fuck are we when the lights go off?
Fenty is only the fourth producer in the play’s history, and its first American. “I might die in the job,” he jokes. He bought the rights two years ago and sees himself as the play’s “steward”, which currently involves replacing the cast every six months, refurbishing the theatre and commissioning the first brand-new set in three decades. “It’s incredibly important to me that the piece is as it was when it opened but doesn’t feel dusty,” he says. “We want it to feel like you’re going to the opening night 75 years ago.”
The Mousetrap is one of the few Christie properties not owned by Agatha Christie Ltd, which orchestrates a complex web of copyright agreements under the leadership of Christie’s great-grandson James Prichard. Between The Mysterious Affair at Styles in 1920 and Curtain in 1975 (both featuring the fastidious Belgian sleuth Hercule Poirot), Christie published 74 novels and 160-plus short stories, plus numerous plays for stage and radio, which have sold more than two billion copies. Since 1928’s The Passing of Mr Quin, there have been at least 50 films based on her work, and even more TV dramas.
In 2026, Christie is as ubiquitous as ever, with Seven Dials on Netflix, The Murder of Roger Ackroyd on the A-level syllabus, Witness for the Prosecution in its ninth year at County Hall and the young-Poirot series Hercule on the way. This autumn will see a major Christie exhibition at the British Library, and Cathy Rentzenbrink’s The Agatha Christie Cure, a memoir about rediscovering her novels during a tough year, is out this week.
The current cast of The Mousetrap at St Martin’s Theatre. L-R: Dugald Bruce-Lockhart, Saranna Parlone, Ben Riddle, Ben Galvin, Stefan Chanyaem, James Staddon, Joanne Henry, Anna Rawlings. Photo: Matt Crockett
“The estate is very good at keeping her in the public consciousness,” says Matt Newbury, creative director of the Agatha Christie Festival in Devon. “Everything from graphic novels to computer games to Netflix series to big Hollywood movies. The books keep selling because of these adaptations.” But there’s a lot more to Christie’s deathless appeal than canny marketing.
The Mousetrap began as a birthday present. Queen Mary, the widow of George V, was turning 80 in May 1947 and requested a half-hour radio play from Christie as part of the BBC’s celebrations. Christie supplied Three Blind Mice, a country-house murder mystery with a true-crime inspiration. Something about it stuck, because Christie rewrote it as a short story and then a three-act thriller, renamed after Hamlet’s play-within-a-play when the playwright of an earlier Three Blind Mice complained. She entrusted it to 40-year-old Saunders, who had produced The Hollow a year earlier, and gave the rights to her grandson Mathew Prichard for his ninth birthday. His Colwinston Trust has since donated tens of millions of pounds of Mousetrap royalties to the arts in Wales.
Richard Attenborough and Sheila Sim in the original production of Agatha Christie's The Mousetrap in the 1950s. Photo: PA Images / Getty
The Mousetrap is a classic one-room mystery – a married couple, five colourful guests and a detective trapped in a snowbound guest house – but, Christie wrote in her autobiography, “I must say that I had no feeling whatsoever that I had a great success on my hands.” The first performance, at Theatre Royal, Nottingham on 6 October 1952, was “anything but a triumph,” recalled Richard Attenborough, who starred alongside his wife, Sheila Sim, and later used his share of the play’s profits to help finance Gandhi.
The show’s durability astonished its creators. Christie predicted that this “nice little play” would run for eight months; Saunders ventured 14. “This is going to shock you,” he told the Sunday Dispatch in 1958, “but I think The Mousetrap is going to run another five years.” Some theatre critics have been complaining for decades that The Mousetrap needs to bring down the final curtain. Saunders himself considered long runs “desperately bad for the theatre”, because they squeezed out new productions, but a hit is a hit.
Brian Fenty, the show’s producer, calls The Mousetrap the ‘gold standard’ in cosy crime, but it also has a core of brutality and tragedy drawn from real life
At the opening party, Christie explained her methodology to Sunday Dispatch columnist Moore Raymond: “You first of all make a murder suspect of everybody in the play except the victim. Then you indicate that it couldn’t have been a single one of the suspects. That’s the way to produce a surprise.” Every night, the play closes with an actor imploring the audience to keep the secret. From his conversations with punters during the interval, Fenty estimates that three in four people come without knowing (I was one of them). “I don’t think it matters if you know who did it,” says Newbury, who has seen it three times. “It’s how you get there that’s fascinating.”
Fenty calls The Mousetrap the “gold standard” in cosy crime, but it also has a core of brutality and tragedy drawn from real life. In fact, Christie admitted she was “a little depressed” that she had misjudged the tonal balance with too much comedy. But artistic director Denise Silvey, who has cast The Mousetrap since 2009 and directed it multiple times, says that it’s precisely the “light and shade” that makes the play so interesting.
Under Fenty, the production leans into the true-crime origins for the first time, reproducing newspaper clippings in the programme. Christie was inspired by the shocking case of three fostered brothers who were abused on a Shropshire farm, one of whom, Dennis O’Neill, died in 1945 after being starved and beaten. The foster father was convicted of manslaughter and the mother of neglect, in a landmark case that led to the Children Act 1948. But not until 2006 did O’Neill’s younger brother Terry learn that The Mousetrap was based on his story. He came to see it and was “quite emotionally drained,” says Silvey.
“Agatha Christie was an astonishing observer of the vagaries and cruelties of human beings,” says the screenwriter Sarah Phelps. She has never seen The Mousetrap. In fact, until she was invited to adapt 1939’s And Then There Were None for the BBC in 2016 she had never read a word of Christie. “It was nothing like what I thought it was,” she marvels. “It was so dark and remorseless.” It was the year of the Brexit referendum, so Phelps pitched “to tell a story of where we are in 2016 by doing a quintet of where we were. Really, what she was writing about was national identity. Who the fuck are we when the lights go off?”
Picture Christie on screen and you’ll probably recall two versions: the all-star Hollywood spectacles of the Peter Ustinov Poirot movies (since revived by Kenneth Branagh), or the teatime satisfactions of David Suchet’s Poirot and Joan Hickson’s Miss Marple. A murder tears a gash in English society but it is neatly sealed once the evildoer is identified and the victims forgotten. In Phelps’s five adaptations, though, the wounds won’t close and the ghosts won’t rest. “There is a tension between the book she wants to write and the book she knows people want to read. That tension makes me search for the off-key detail, the dark minor note, that makes me think, oh, that’s the story!”
Christie began writing when she was a Red Cross dispenser during the first world war (Poirot was a Belgian refugee) and stopped around the time US troops left Vietnam six decades later. She wrote about her times, scouring the newspapers for fresh motives for murder. Yet for digging into this historical trauma in 2018’s The ABC Murders, Phelps received actual death threats. “That’s when you realise how potent Christie is to the national identity,” she says. “Red buses and village greens and old ladies on bicycles and no black people. When you kick that foundation stone away, people get phenomenally angry. My job is to say there’s a really serious intellect here and there’s a lot going on.”
Agatha Christie Ltd is smart enough to know that these different Christies – the cosy and the subversive – can exist simultaneously, and both can be found in The Mousetrap. The real surprise for me wasn’t the killer’s identity but the very thing that Christie worried about: the strange blend of comedy and tragedy; of parlour game and real-life pain. This quintessential Christie entertainment also contains what Phelps calls “our blood-soaked, ghost-haunted history”. It shows us a postwar Britain that realised it was failing its children.
Christie died in 1976, missing the play’s 10,000th performance by a year. Peter Saunders died in 2003, not long after its semicentenary. The Mousetrap outlives them, and may outlive us all.
The Mousetrap is at St Martin’s Theatre, London, indefinitely, and touring
The Agatha Christie Festival, featuring a run of The Mousetrap, runs from 12-20 September in Devon