Constructing suspense: The anatomy of a thriller

A strong grip on the armrest. A subtle lean closer to the screen… so close you feel you could warn the characters about the danger awaiting them. Your heart thumps in anticipation of what’s to come. Thrillers thrive on the build‑up of tension and are wholly driven by omission — what is withheld, concealed, or left unsaid. These elements instil a deep, bodily fear, leaving us waiting with apprehension and anxiety. If a film doesn’t make you feel this way, it is most definitely not a thriller. 

Defining the term ‘thriller’ as “a story of high suspense” immediately positions suspense as the genre’s core. Rather than relying on the supernatural, as seen in horror, thrillers focus on the harsh and often gruesome realities of the world — crime, psychology, conspiracy. These take shape in several sub‑genres: psychological thrillers, crime thrillers, action thrillers, political thrillers, and more. Regardless of type, suspense must remain the backbone of the narrative for the film to succeed. 

Tension and relief allows audiences to process what they’ve witnessed. However, the reprieve should never last long enough for them to feel safe; tension must always lurk just around the corner

A good thriller should be constantly moving — secrets unravelling, unexpected turns emerging. Yet there must also be space for relief: moments where the audience can briefly recover from the tension. After grotesque scenes, such as the infamous shower sequence in Alfred Hitchcock’s Psycho, where Marion Crane is savagely stabbed, viewers need a moment to breathe. This technique, known as tension and relief, allows audiences to process what they’ve witnessed. However, the reprieve should never last long enough for them to feel safe; tension must always lurk just around the corner. 

Another essential component of the thriller genre is cause and effect — a chain of actions that creates ongoing and escalating conflict. 

Consider Clarice Starling in The Silence of the Lambs: a timid trainee surrounded by judgmental male counterparts. Despite these limitations, she perseveres, refuses to give up, and ultimately solves the case. She is a prime example of a strong protagonist — another vital element of a thriller. Her resilience drives the story, and the obstacles around her only strengthen her determination to prove herself. 

Strong protagonists in thrillers are hardly flawless heroes; instead, they are defined by vulnerability, determination and moral complexity. Their personal limitations enhance the stakes, and so audiences become invested in their journey because their success is never fully guaranteed. The blending of resilience and fragility ensures that the protagonist stays compelling through the narrative, grounding the film’s tension within human experience rather than spectacle. This is what keeps the audience so intensely connected to the protagonist, rooting for them until the very end. 

Thrillers also require a mystery at the heart of the narrative — something or someone the protagonist must uncover…

Who is Buffalo Bill?  

Who is John Doe, and what is his motive?  

Is Kevin Wendell Crumb’s condition purely psychological… or something more? 

A thriller must keep its audience on the edge of their seat, desperate to discover the film’s resolution. 

Opposing the relentless protagonist, a thriller should also feature a cunning, ruthless villain whose intelligent and meticulous plans are difficult to unravel. The protagonist should struggle to crack the case until the very end. This is exemplified in David Fincher’s Se7en, where the killer brutally murders those who represent the seven deadly sins, believing himself an agent of divine justice. His twisted motive reveals his delusion yet leaves the audience in awe — especially as his final act becomes the film’s most shocking moment. 

The villain’s unpredictability keeps the audience guessing, while the protagonist’s resourcefulness provides hope amidst the chaos

Equally important is the dynamic between the protagonist and the antagonist. A well created thriller thrives on the psychological interplay between the two, both pushing each other to their limits. The villain’s unpredictability keeps the audience guessing, while the protagonist’s resourcefulness provides hope amidst the chaos. This tension creates a back and forth narrative which drives the story forward, ensuring that every confrontation feels earned and every twist has an immense impact.  

As established from the beginning, suspense is the spine of a thriller — the point from which the narrative circulates. Relief enhances tension, protagonists and villains sharpen conflict, and mystery sustains momentum. Together, these elements form the foundation of a truly gripping thriller.