Watch Mystery Movies Online, List of 2020 Mystery Films

Brahms: The Boy II (2020)
Horror, Thriller, Mystery
After a family moves into the Heelshire Mansion, their young son soon makes friends with a life-like doll called Brahms.
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Brahms: The Boy II

Knives Out (2019)
Drama, Comedy, Thriller, Crime, Mystery
When renowned crime novelist Harlan Thrombey is found dead at his estate just after his 85th birthday, the inquisitive and debonair Detective Benoit Blanc is mysteriously enlisted to investigate. From Harlan's dysfunctional family to his devoted staff, Blanc sifts through a web of red herrings and self-serving lies to uncover the truth behind Harlan's untimely death.
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Knives Out

Gone Girl (2014)
Drama, Thriller, Mystery
With his wife's disappearance having become the focus of an intense media circus, a man sees the spotlight turned on him when it's suspected that he may not be innocent.
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Gone Girl

Se7en (1995)
Thriller, Crime, Mystery
Two homicide detectives are on a desperate hunt for a serial killer whose crimes are based on the "seven deadly sins" in this dark and haunting film that takes viewers from the tortured remains of one victim to the next. The seasoned Det. Sommerset researches each sin in an effort to get inside the killer's mind, while his novice partner, Mills, scoffs at his efforts to unravel the case.
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Se7en

Scoob! (2020)
Adventure, Animation, Comedy, Mystery, Family
In Scooby-Doo’s greatest adventure yet, see the never-before told story of how lifelong friends Scooby and Shaggy first met and how they joined forces with young detectives Fred, Velma, and Daphne to form the famous Mystery Inc. Now, with hundreds of cases solved, Scooby and the gang face their biggest, toughest mystery ever: an evil plot to unleash the ghost dog Cerberus upon the world. As they race to stop this global “dogpocalypse,” the gang discovers that Scooby has a secret legacy and an epic destiny greater than anyone ever imagined.
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Scoob!

Arrival (2016)
Drama, Science Fiction, Mystery
Taking place after alien crafts land around the world, an expert linguist is recruited by the military to determine whether they come in peace or are a threat.
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Arrival

The Maze Runner (2014)
Action, Thriller, Science Fiction, Mystery
Set in a post-apocalyptic world, young Thomas is deposited in a community of boys after his memory is erased, soon learning they're all trapped in a maze that will require him to join forces with fellow “runners” for a shot at escape.
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The Maze Runner

Get Out (2017)
Horror, Thriller, Mystery
Chris and his girlfriend Rose go upstate to visit her parents for the weekend. At first, Chris reads the family's overly accommodating behavior as nervous attempts to deal with their daughter's interracial relationship, but as the weekend progresses, a series of increasingly disturbing discoveries lead him to a truth that he never could have imagined.
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Get Out

What Lies Beneath (2000)
Drama, Horror, Thriller, Mystery
When Claire Spencer starts hearing ghostly voices and seeing spooky images, she wonders if an otherworldly spirit is trying to contact her. All the while, her husband tries to reassure her by telling her it's all in her head. But as Claire investigates, she discovers that the man she loves might know more than he's letting on.
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What Lies Beneath

Enola Holmes (2020)
Adventure, Drama, Crime, Mystery
While searching for her missing mother, intrepid teen Enola Holmes uses her sleuthing skills to outsmart big brother Sherlock and help a runaway lord.
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Enola Holmes

You Should Have Left (2020)
Horror, Mystery
In an effort to repair their relationship, a couple books a vacation in the countryside for themselves and their daughter. What starts as a perfect retreat begins to fall apart as one loses their grip on reality, and a sinister force tries to tear them apart.
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You Should Have Left

Midsommar (2019)
Drama, Horror, Mystery
Several friends travel to Sweden to study as anthropologists a summer festival that is held every ninety years in the remote hometown of one of them. What begins as a dream vacation in a place where the sun never sets, gradually turns into a dark nightmare as the mysterious inhabitants invite them to participate in their disturbing festive activities.
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Midsommar

Harry Potter and the Order of the Phoenix (2007)
Adventure, Fantasy, Mystery
Returning for his fifth year of study at Hogwarts, Harry is stunned to find that his warnings about the return of Lord Voldemort have been ignored. Left with no choice, Harry takes matters into his own hands, training a small group of students – dubbed 'Dumbledore's Army' – to defend themselves against the dark arts.
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Harry Potter and the Order of the Phoenix

The Postcard Killings (2020)
Drama, Crime, Mystery
A New York detective investigates the death of his daughter who was murdered while on her honeymoon in London and recruits the help of a Scandinavian journalist when other couples throughout Europe suffer a similar fate.
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The Postcard Killings

Allegiant (2016)
Adventure, Action, Science Fiction, Mystery
Beatrice Prior and Tobias Eaton venture into the world outside of the fence and are taken into protective custody by a mysterious agency known as the Bureau of Genetic Welfare.
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Allegiant

Ready or Not (2019)
Horror, Comedy, Thriller, Mystery
A bride's wedding night takes a sinister turn when her eccentric new in-laws force her to take part in a terrifying game.
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Ready or Not

Hereditary (2018)
Horror, Thriller, Mystery
When Ellen, the matriarch of the Graham family, passes away, her daughter’s family begins to unravel cryptic and increasingly terrifying secrets about their ancestry.
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Hereditary

Gattaca (1997)
Thriller, Science Fiction, Mystery, Romance
In a future society in the era of indefinite eugenics, humans are set on a life course depending on their DNA. Young Vincent Freeman is born with a condition that would prevent him from space travel, yet is determined to infiltrate the GATTACA space program.
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Gattaca

Followed (2020)
Horror, Thriller, Mystery
To gain more subscribers, a controversial vlogger stays at a cursed hotel with terrifying results.
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Followed

What Happened to Monday (2017)
Drama, Thriller, Science Fiction, Mystery
In a world where families are limited to one child due to overpopulation, a set of identical septuplets must avoid being put to a long sleep by the government and dangerous infighting while investigating the disappearance of one of their own.
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What Happened to Monday

The Nun (2018)
Horror, Thriller, Mystery
When a young nun at a cloistered abbey in Romania takes her own life, a priest with a haunted past and a novitiate on the threshold of her final vows are sent by the Vatican to investigate. Together they uncover the order’s unholy secret. Risking not only their lives but their faith and their very souls, they confront a malevolent force in the form of the same demonic nun that first terrorized audiences in “The Conjuring 2” as the abbey becomes a horrific battleground between the living and the damned.
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The Nun

Prometheus (2012)
Adventure, Science Fiction, Mystery
A team of explorers discover a clue to the origins of mankind on Earth, leading them on a journey to the darkest corners of the universe. There, they must fight a terrifying battle to save the future of the human race.
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Prometheus

Insidious: The Last Key (2018)
Horror, Thriller, Mystery
Parapsychologist Elise Rainier and her team travel to Five Keys, NM, to investigate a man’s claim of a haunting. Terror soon strikes when Rainier realizes that the house he lives in was her family’s old home.
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Insidious: The Last Key

Black Christmas (2019)
Horror, Mystery
Hawthorne College is winding down for the holidays, yet one by one, sorority girls are being picked off. Riley Stone, a girl dealing with her own trauma, begins to notice and tries to save her friends before they too are picked off.
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Black Christmas

Tomorrowland (2015)
Adventure, Science Fiction, Mystery, Family
Bound by a shared destiny, a bright, optimistic teen bursting with scientific curiosity and a former boy-genius inventor jaded by disillusionment embark on a danger-filled mission to unearth the secrets of an enigmatic place somewhere in time and space that exists in their collective memory as "Tomorrowland."
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Tomorrowland

A Walk Among the Tombstones (2014)
Drama, Thriller, Crime, Mystery
Private investigator Matthew Scudder is hired by a drug kingpin to find out who kidnapped and murdered his wife.
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A Walk Among the Tombstones

Us (2019)
Horror, Thriller, Mystery
Husband and wife Gabe and Adelaide Wilson take their kids to their beach house expecting to unplug and unwind with friends. But as night descends, their serenity turns to tension and chaos when some shocking visitors arrive uninvited.
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Us

The Vast of Night (2020)
Drama, Science Fiction, Mystery
At the dawn of the space-race, two radio-obsessed teens discover a strange frequency over the airwaves in what becomes the most important night of their lives and in the history of their small town.
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The Vast of Night

The Prestige (2006)
Drama, Thriller, Mystery
A mysterious story of two magicians whose intense rivalry leads them on a life-long battle for supremacy -- full of obsession, deceit and jealousy with dangerous and deadly consequences.
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The Prestige

Dial M for Murder (1954)
Drama, Thriller, Crime, Mystery
An ex-tennis pro carries out a plot to have his wife murdered after discovering she is having an affair, and assumes she will soon leave him for the other man anyway. When things go wrong, he improvises a new plan—to frame her for murder instead.
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Dial M for Murder

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