Audiences love to feel as if they’re a part of the action when they watch a television show. To be able to immerse oneself is the excitement. So, when it comes to detective series, being able to figure out the mystery, murder, or crime alongside the protagonist is the thrill. Solving the case before them makes it even better!
The genre has often led to some of the most bingeable content, so we’re here to celebrate perfect detective shows with 20 episodes or less. Whether miniseries or long-running titles with shorter-episode seasons, these shows are exceptional at building the tension before executing the catch. Of course, there will be twists and turns along the way. Some procedurals are a case-of-the-week story while others use a singular season for a particular crime. Nevertheless, strap in! These series are simply perfect.
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‘Ballard’ (2025–Present)
Image via Prime Video
If we were looking at shows with longer episode runs, then most certainly we would be discussing the beloved Prime Video series Bosch. But the next best thing is the spin-off, Ballard. Based on Renée Ballard by Michael Connelly, the police procedural follows Renée Ballard (Maggie Q) as she leads the department’s newly formed, underfunded, all-volunteer cold case division. Detective Ballard and her eccentric team tackle Los Angeles’ most challenging, long-forgotten crimes, while uncovering a dangerous, deep-seated conspiracy within the LAPD. While Harry Bosch (Titus Welliver) does cross over to help her navigate the life-threatening dangers tied to the conspiracy, this series is all Ballard, all the time.
With a second season coming, Ballard picks up where Bosch and Bosch: Legacy left off. Created by Michael Alaimo and Kendall Sherwood, Ballard pairs Q’s grounded, magnetic performance with sharply written stories, tight pacing, and a rich connection to the extended Bosch universe. As Ballard, Q brings a raw intensity alongside empathy and quiet vulnerability to a detective forced into the basement unit. The rapport she has with the underdog volunteers and investigators, namely the ambitious Samira Parker (Courtney Taylor), builds the emotional stakes within the episodic cold cases and overarching serialized conspiracy. Whether you are coming into the series fresh or as a long-time Bosch fan, Ballard proudly lives on its own.
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‘Happy Valley’ (2014–2023)
Image via BBC
If you’re from the UK, you likely already know about the powerhouse that is Happy Valley. If you’re new to the series, strap in—it’s extraordinary. The BAFTA-winning series created by Sally Wainwright is a grisly crime drama that follows Catherine Cawood (Sarah Lancashire), a strong-willed police sergeant in a small West Yorkshire town. She deals with local crimes while trying to protect her family from a dangerous criminal linked to her past tragedy—the prison release of Tommy Lee Royce (James Norton), the violent man whom she blames for her daughter’s suicide. Set in the Calder Valley, a depressed locale with severe drug problems which cops jokingly refer to as “happy valley,” the sensational series blends gripping, high-stakes crime writing with rich emotional realism through a complex examination of family, trauma, and local heroism. At its core, Happy Valley is a richly human story.
Happy Valley is a harrowing series that features one of the greatest character examinations led by a fervent performance by Lancashire. Paired with Wainwright’s naturally grounded dialogue, Lancashire gives a tour de force performance. She balances fierceness with extraordinary vulnerability and tinges of dark humor. Cawood is a deeply flawed woman experiencing immense grief. Her decision-making regarding outside cases is sometimes hindered as her mind is on Tommy at all times, especially when he gets closer to her grandson, Ryan (Rhys Connah). While you may know Norton today from his role as Ormund Hightower on House of the Dragon, he provides a chilling performance as the complex villain. He’s a snake and a cockroach all rolled up into one. Through three seasons, with a major real-time jump for Season 3, Happy Valley avoids glossy detective tropes in order to focus on the messy realities on the ground in the small community. Happy Valley is an excruciatingly high-tension, slow-burning masterpiece that never skimps on the cruel, gruesome truths.
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‘Luther’ (2010–2019)
Tapping out our list with 20 episodes over five seasons comes the psychological crime thriller, Luther. Written by Neil Cross, the series follows DCI John Luther (Idris Elba), a brilliant yet self-destructive homicide detective in London. Luther gets deep inside the minds of killers using unconventional methods, but his intense, violent temper and emotional impulses frequently put him at odds with his bosses as he battles his inner demons. The most prominent antagonist is Alice Morgan (Ruth Wilson), a brilliant scientist and murderer whom Luther cannot legally convict. They form a twisted, complex intellectual bond and alliance. Each season features gritty investigations into violent crimes, psychological predators, and serial killers. Through an inverted “howcatchem” format where the killer is often revealed early, Luther is a compelling detective thriller that helped to establish the powerhouse that is Elba.
The narrative focus shifts tothe psychological cat-and-mouse hunt. Atmosphere is everything as it captures dark London backed by gloomy soundtrack creating an oppressive tone that Luther must overcome. A highly addictive series,Luther keeps seasons compact preventing bloated storytelling allowing for breakneck pacing and emotional exhaustion. Elba infuses raw intensity and magnetic charisma anchoring it. Luther operates on edge breaking rules channeling darkness of criminals he hunts. Like many series,Luther has been given movie special,Luther: The Fallen Sun.
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