The Diamond Man

In Dijon, Inspector Hanaud investigates Betty Harlowe after her uncle, Boris Waberski, accuses her of poisoning her wealthy aunt for an inheritance. While an initial autopsy finds nothing, Hanaud discovers the use of Strophanthus Hispidus—a rare, undetectable poison applied via an antique arrow. Amidst a flurry of "poison pen" letters and deception, Hanaud proves the murder occurred despite the lack of conventional medical evidence.

A reporter and a detective team up to solve the murder of a nightclub singer who had been involved in a divorce scandal.

Wanting to escape from the drab life of the country, Helen Wayne moves to the big city and becomes a secretary for the Calder family. Just before beginning her new job, however, Helen meets a man who promises to take the hungry girl to dinner. When she goes to the prearranged meeting place, she is arrested and her name is put on the police record. Some time later, Helen and young Rand Calder fall in love. As they are about to announce their engagement, Martin Ingleton, the man who earlier had caused Helen's arrest, attempts to ruin Rand's business ventures. When all of the principals go to court to fight the issue, Ingleton recognizes Helen and tries to label her a woman of unworthy character. Instead of causing Rand to admonish her, however, Ingleton instigates Helen to tell the judge her story and she is exonerated.

Ranch foreman Kerry has boarded with Kitty Tynan and her mother for five years in western Canada, his past is a mystery to everyone. He is actually an English aristocrat who lost all his money gambling and left the country in search of work. Kerry and his friend Horan own an option on property which crooked lawyer Burlingame is trying to secure. Burlingame's cohort Logan murders Hogan, and is caught and arrested. In the trial, Burlingame forces Kerry to admit his past, and succeeds in preventing Kerry from receiving bank assistance. When Kerry is shot, Kitty opens a letter from Kerry's wife that he had been carrying for five years, and cables her. Kerry's wife arrives and informs him that his last bet in England had turned out to be a $20,000 winner. Kerry is able to use the money just in time to foil Burlingame and secure the property, thus winning prosperity and the affections of his wife.

Cordelia Marlowe comes from a society family that has lost its fortune. She falls into the clutches of D.K. Franklin, a crooked lawyer who specializes in blackmail, and finds herself involved in Franklin's scheme to extort money from a family friend. She sets out to protect her friend's money and expose Franklin for the thief he is.

A young newspaper man from San Francisco arrives in the Yukon to start a newspaper and conflict ensues. Based on the poem by Robert W. Service.

A trusted laundromat employee is sent to the bank to cash the payroll but is robbed by a couple of thugs then locked up in a closet and cuffed with shirts hand and foot. One thug writes a note on an old cuff to his friend to meet him at the station. When the landlady comes in, she takes that cuff with other wash and sends it at once to the laundry where its discovery makes possible not only the rescue of the prisoner and the capture of the outlaws, who are cuffed in steel.

During the illness of her father, Toni Carter, Milly takes his place as station agent. Both Dave Snowden, a freight engineer, and Bill Mailey love her. Bill, a land express courier, who distrusts and dislikes Dave sees that both the girl and her father favor his rival and decides to disgrace the station agent and his daughter.

Young thief “The Bat” to distract an old bookseller, while his partner, “The Fly,” robs the till, purchases a book at random. Later, after a chase and escape to the Devil's Roost, Old Meg's refuge for thieves, he takes the book from his pocket and is about to throw it aside when the title attracts him, "Electricity Made Simple." Intrigued, the volume opens a new life to him and in time enables him to rescue the bookseller’s daughter Bess when she falls into trouble.

When his buddy is murdered a dedicated cop, goes after the gang responsible.

A detective saves his boy assistant from a bank swindler after escaping a fire by overhead cable.

A detective is drugged with flowers and tied to a sawmill while saving an ex-gambler from a jewel theft charge.

A boxer saves a girl from a noble kidnapper.

Gertie Jones, known among other thieves as "The Chatterbox" because she talks to herself while she works, becomes a rich woman's French maid after learning about her employer's $40,000 diamond necklace. To cover up the scratches left by her tools after she unsuccessfully tries to open the safe containing the necklace, Gertie telephones the police to report an attempted burglary. Jimmy Hartigan, a famous thief, arrives and after he and Gertie fall in love at first sight, he is arrested.

Denounced for preaching socialism Reverend Frank Gordon founds his own "Temple of Man." financed by Kate Ransom, the woman Gordon has fallen in with love and entered into a common-law agreement with after divorcing his wife. With the outbreak of World War I, however, the members of his new congregation oppose conscription while he wholeheartedly supports the Allied cause. Driven from his own church, he returns home to find Kate in banker Mark Overman's arms, enraged he strangles the banker. Sentenced to life imprisonment, his ex-wife Ruth pleads with Governor Morrison to pardon the errant clergyman. Gordon is allowed to return to his family.

Millionaire Joshua Barker insists that his daughter, Faith, must marry Phil Langhorne, a man that neither likes, and Faith is in love with and eager to marry her childhood sweetheart, John Temple.

Adventuress Leonie Sobatsky falls in love with a young man named Nevil Trask, and he with her. Trask doesn't know that Leonie is actually the head of an international smuggling ring--and Leonie doesn't know that Trask is an undercover Secret Service agent assigned to break up the ring and capture its head.

A lady gambler shields her brother by claiming responsibility for a forgery he committed.

Villainous convict Ralph Vickers plots against a Mill owner Mr. Lucas. Vickers works to undermine Lucas while pursuing his daughter, Geraldine. Vickers' schemes are eventually thwarted by the mill’s office boy, who manages to baffle the villain's designs.

The Gray Ghost is a 1917 American crime-drama film serial directed by Stuart Paton. Chapters: 1. The Bank Mystery; 2. The Mysterious Message; 3. The Warning; 4. The Fight; 5. Plunder; 6. The House of Mystery; 7. Caught in the Web; 8. The Double Floor; 9. The Pearl Necklace; 10. Shadows; 11. The Flaming Meteor; 12. The Poisoned Ring; 13. The Tightening Snare; 14. At Bay; 15. The Duel; 16. From Out of the Past.