The Mystery of Lake Lethe

Allayne Norman's husband Bruce is a gambler and drunkard who kills her artist cousin in an argument. Bruce flees the studio with Allayne and their son, and places his identifying documents in the pockets of an amnesiac man. To avoid the consequences of his actions, Allayne identifies the man as her husband. When Bruce returns, he tries to kill the man but is shot instead. The man regains his memory and is cleared of wrongdoing.

After old Trowbridge is mysteriously murdered, his nephew, Kane Langdon, is accused of the crime. Trowbridge's adopted daughter Alice makes every effort to prove Kane's innocence, but to no avail. When Kane escapes from the clutches of the law, Alice works with him to investigate the crime. They soon discover that Judge Hoyt, a great friend of Trowbridge and an ardent admirer of Alice, killed Trowbridge after forging the old man's will to read that Alice would only inherit his fortune if she married the judge. The judge, confronted with the accusation, becomes so unnerved that he confesses to the crime, and all ends happily with Alice in Kane's arms.

A film buff's obsession with an elusive, possibly nonexistent film spirals into a dangerous descent, blurring the line between reality and madness.

15 chapter mystery serial: [1] “The House of Secrets,” released 5 April 1915; [2] “The Face of Fear,” released 12 April 1915; [3] “The Silver Cup,” released 19 April 1915; [4] “The Ring of Death,” released 26 April 1915; [5] “No Other Way,” released 3 May 1915; [6] “The Strength of Love,” released 10 May 1915; [7] “Into the Night,” released 17 May 1915; [8] “In the Wolf’s Den,” released 24 May 1915; [9] “The Iron Hand of the Law,” released 31 May 1915; [10] “The Inspiring Sword,” released 7 June 1915; [11] “The Valley of the Shadow,” released 14 June 1915; [12] “The Sacrifice,” released 21 June 1915; [13] “The Man Who Did Not Die,” released 28 June 1915; [14] “A Story of the Past,” released 5 July 1915; [15] “The Coming of the Kingdom,” released 12 July 1915.

A doctor who cannot figure out what is wrong with his patient refers him to a detective, whom he hopes will be able to discern the cause of his mysterious illness.

Chaney plays two roles: mad scientist Arthur Lamb and Lamb's "experiment", known only as the Ape Man. This hideous creature was the result of Lamb's attempts to transplant animal glands into human beings. A lost film.

Holmes goes on the trail of a Rembrandt painting, stolen by a drug-addicted artist.

A man assists a woman to dispose of the body of her stepfather....

A woman's cheating husband is murdered at their country estate, and suspicion immediately falls on her.

This silent mystery is considered a lost film.

A barber who mistakenly believes he has killed a burglar and seeks shelter in the home of a manicurist.

Feature version of the 1945 American serial film of the same name, composed for export only, never seen in the USA and now evidently a long-lost film.

An operator at a mobile pager company has her life turned upside down by a seemingly senseless abduction. Currently considered to be a lost film (never released to the general public, after its theatrical premiere in Puerto Rico).

After coming under suspicion for a computer technician's murder, six hackers team up to try to find the real killer.

Much-married and once successful writer Henry T. Aythecliff, now heavily in debt, summons his three ex-wives to his mansion, planning to extort a sizable amount of money from each. When he is discovered dead, clues indicate that each of his four wives had motive and opportunity to murder him, and a young detective must sift through some ingeniously devised evidence.

A murdering skyjacker parachutes to safety and poses as a novice monk in an isolated New Mexico monastery.

Mystery film in the detective Stuart Webbs series.

Harry Larrabee, a young playwright, lives in the same studio apartment house with Carolyn Vaughn, a painter of miniatures, with whom he falls in love. "The Wolf," a famous criminal, supposed to be dead, returns and communicates with his wife, a friend of Carolyn's. He forces his wife and her brother to aid him in a plot to rob Carolyn of her valuable jewels. Harry, by one of his famous "inspirations," discovers that a crime is being committed, rescues Carolyn and bears her away in a taxicab. He is himself suspected of the crime, but, undisturbed by the web of circumstance by which he is entangled, his wonderful inspirations give him the key to the conspiracy which led up to the crime. In an unusual and powerful finale the guilty parties fight among themselves and justice triumphs in an exciting climax.

After finding her sister dead, Maria tries to find out who or what is to blame.

A young nurse reports to work in a hospital's psychiatric wing and gets involved in a series of mysterious deaths.