Best Mystery Movies of 1920

Inventor Harry Harper (Harry Houdini) travels to the South Seas, where there is buried treasure belonging to a girl, Beverly West (Lila Lee). Naturally, others are after the loot, and Beverly's father (Fred Turner) is being held captive by cannibals until she returns to them with a pearl that belongs to one of their idols. The climax consists of Harper saving Beverly from a safe which has been lowered into the sea.

Robert Castleback is in possession of secret papers which could bring a certain prince to power under conditions which would make Castleback a ruling force in Europe. Master crook Arsene Lupin becomes aware of Castleback's bid for power and, in the interests of France, begins a search for the plans.

A bumbling would-be detective always seems to reach the wrong conclusion, but one day accidentally stumbles across a real crook, guilty of a real crime.

At a party thrown at the Metcalf estate, the Marquise D'Irancy's Sultana diamond disappears when the lights go out during a power failure. Suspected of the crime is William Kirkland, the wastrel son of the wealthy Kirkland family, but William's sister Diana comes to his defense. Aiding her in the investigation is Clamp, a wandering peddler.

Spaulding Nelson moves into an apartment after his uncle has been driven from it by the sounds of screams and whispers. Upon undertaking an investigation, he meets neighbor Barbara Bradford, whose sister Clara is being tormented by the recurring sounds of her dead husband Roldo's voice.

Tex, a famous detective, recounts the story of how he went into the crime business: While visiting his old friend, Jack Nelson, a dispute breaks out between Nelson and his butler. Later that night, Nelson is murdered, and the next morning the murder weapon, a knife, is discovered next to the body. Edna, the victim's wife, seizes the knife, and Tex, fearing that she is about to kill herself, throws the weapon out the window. Interpreting Tex's actions as incriminating, the police arrest him, and he is sentenced to prison. Two years later, a fire breaks out at the penitentiary, and Tex's bravery in saving the warden's wife and child wins him a pardon. Determining to solve Nelson's murder, Tex searches for the butler but discovers him to be innocent. Summoned to Edna's deathbed, Tex hears her confess to the crime, thus causing him to devote his life to solving crimes and saving innocents from being convicted on circumstantial evidence.

Laura Bruce is married to John Bruce, police commissioner. She discovers her husband is enjoying a drunken revel with another woman, and vows she will obtain a divorce. After doing so she weds Paul Ramsey. His employer, Dick Turner, a libertine, offers his a responsible position in the west, and she faces a long separation. Ramsey later learns that Turner is interested in his wife and engages a man to protect her, who happens to be her former husband.

Small town politician and banker Brent Warren is responsible for a murder, but only George Roan is sent to the gallows for it. Roan, however, is resuscitated after he is hung and proceeds to secretly haunt Warren's life. District attorney Cullen Grant is sure that Warren was behind the killing and has him arrested. Warren's fiancee, Dare Keeling, also happens to the Grant's ex-sweetheart, and she believes in his innocence. Her brother, Larry, however, isn't so sure and he goes to work as Warren's secretary.

A detective is on the verge of revealing the identity of an elusive criminal. At the crucial moment, hedrops dead, the victim of foul play. A revolutionary electric devise is utilized to bring the detective back to life long enough for the successful completion of his mission.

A thief known as The Hawk has stolen the treasured Garter from the British Museum. One of the men pursuing the thief is mistakenly thought to be The Hawk himself, and so must seek his quarry while himself being hunted.

A man and two women, suspected of stealing bonds, are traced to a country hotel. While Judith, one of the women, is out horseback riding, the other two, Walter and Vera, are arrested. When, during a storm, Judith is injured in a fall from her horse, Boone Pendleton comes to her rescue. Soon the river becomes impassable, and they are trapped in Boone's cabin, where the two fall in love.