What Is ‘Wild Horse Nine’ Based On? The Real History Behind Martin McDonagh’s Spy Comedy

In the landscape of modern cinema, few storytellers balance blistering absurdity, sharp dialogue, and emotional vulnerability quite like British-Irish auteur Martin McDonagh. Following the acclaim of celebrated works like ‘In Bruges’ and ‘The Banshees of Inisherin’, moviegoers pay close attention whenever a fresh project emerges under his direction. The intrigue surrounding ‘Wild Horse Nine‘ has only intensified following its festival run, leaving audiences curious about the true roots of its narrative.

In an entertainment landscape crowded with recycled franchises, nostalgic remakes, and literary adaptations, viewers frequently wonder whether a period piece draws from print or real events. Discussions have steadily swirled around the dark spy comedy, fueled by its mid-century political backdrop, enigmatic island setting, and idiosyncratic tone. Unraveling the creative genesis of the project requires separating industry speculation from the production’s authentic origins.

Is ‘Wild Horse Nine’ Adapted From a Book or Play?

Despite speculation that the film adapts an obscure novel or stage production, ‘Wild Horse Nine’ is not based on any previously published book or play. The film is an entirely original screenplay written and conceived directly by McDonagh himself. While the writer established his career with acclaimed stage masterworks like ‘The Pillowman’ and ‘A Behanding in Spokane’, this project was engineered from scratch exclusively for the screen.

Rather than adapting existing prose, the filmmaker developed the script alongside Blueprint Pictures and Film4 before securing distribution. As Screen Daily reported during the rollout, Searchlight Pictures acquired the title as a flagship theatrical release for awards season. Backed by a star-studded ensemble including Steve Buscemi, Parker Posey, and Tom Waits, this original premise granted McDonagh complete freedom to navigate thorny geopolitical satire on his own terms.

The Historical Anchor of the 1973 Chilean Coup

While the central characters and their personal interactions are fictional, ‘Wild Horse Nine’ is firmly based around the genuine history of United States clandestine Cold War operations. Set in 1973, the story tracks two American CIA operatives, played by John Malkovich and Sam Rockwell, sent from Santiago to Easter Island by their anxious bureau chief. Their journey unfolds during the tense weeks leading up to the September 11 military coup that overthrew Chile’s democratically elected Marxist president, Salvador Allende.

This fraught historical backdrop provides far more than mere set dressing for the escalating friction between the two bickering operatives. Malkovich’s character, an ailing agent named Chris Carlisle, grapples with a terminal diagnosis and the crushing guilt of decades spent executing foreign interventions.

Throughout the narrative, he explicitly references real-world clandestine milestones, including the 1954 Guatemalan coup d’état, the 1961 assassination of Patrice Lumumba, and conspiracies surrounding the death of John F. Kennedy.

McDonagh leaned heavily into these dark historical truths to anchor the script’s emotional depth and examine institutional complicity. “I’ve been very interested in the truth of what the CIA has been doing over the last 60 years, and the awful things they’ve done all around the world,” McDonagh revealed speaking to The Guardian. The filmmaker noted that rooting the narrative in the Chilean coup transformed the project, adding, “I realised that the story could be about a guy who [feels] guilt and regret about the things he has done”.

Rapa Nui and the Island Inspirations

Beyond Cold War operations, the remote geography of Easter Island, known natively as Rapa Nui, provided foundational inspiration for the project. McDonagh first traveled to the Polynesian territory roughly 15 years earlier, captivated by its dramatic coastal cliffs, ancient moai stone statues, and the logistical challenge of shooting on a sacred UNESCO World Heritage site. Furthermore, the title of the movie directly references the herds of wild horses roaming the island’s plains, serving as a symbolic contrast between untamed nature and clandestine human corruption.

The screenplay underwent a significant evolution before arriving at its finished spy narrative. McDonagh initially drafted a story about an aging actor and his son, but he found the dynamic overly conventional. By shifting the premise to two morally compromised assassins confronting mortality, the director unlocked his signature balance of pitch-black humor and poignant regret.

By pairing the sobering record of Cold War foreign interference with the rugged isolation of Rapa Nui, ‘Wild Horse Nine’ constructs an original narrative that feels grounded in real-world consequence. The resulting dark comedy reflects the moral toll of state violence while remaining rooted in the complex emotional friction of an unraveling partnership.

Share your thoughts in the comments below on how ‘Wild Horse Nine’ blends real Cold War history with its dark comedy, and tell us where you think it ranks among Martin McDonagh’s best movies.